{"product_id":"casio-fx-991cw-original","title":"Casio fx-991CW Original","description":"\u003ch2 data-start=\"86\" data-end=\"114\"\u003e✅ Overview \u0026amp; Authenticity\u003c\/h2\u003e\n\u003cp data-start=\"116\" data-end=\"190\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003eThe fx‑991CW is a second-generation ClassWiz scientific calculator introduced internationally in 2022. It features a high-resolution \u003cstrong data-start=\"133\" data-end=\"157\"\u003e192×63 pixel display\u003c\/strong\u003e with \u003cstrong data-start=\"163\" data-end=\"183\"\u003e4‑tone grayscale\u003c\/strong\u003e, designed for ease of reading and navigation.\u003c\/span\u003e\u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\"\u003e\u003ca href=\"https:\/\/edu.casio.com\/intl\/calculators\/scientific\/fx991cw\/?utm_source=chatgpt.com\" rel=\"noopener\" alt=\"https:\/\/edu.casio.com\/intl\/calculators\/scientific\/fx991cw\/?utm_source=chatgpt.com\" class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]! transition-colors duration-150 ease-in-out\" target=\"_blank\"\u003e\u003cspan class=\"relative start-0 bottom-0 flex h-full w-full items-center\"\u003e\u003cspan class=\"flex h-4 w-full items-center justify-between absolute\"\u003e\u003cspan class=\"max-w-full grow truncate overflow-hidden text-center\"\u003eeBay\u003c\/span\u003e\u003cspan class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\"\u003e+12\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"flex h-4 w-full items-center justify-between\"\u003e\u003cspan class=\"max-w-full grow truncate overflow-hidden text-center\"\u003eCASIO WEW Worldwide Education Website\u003c\/span\u003e\u003cspan class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\"\u003e+12\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"flex h-4 w-full items-center justify-between absolute\"\u003e\u003cspan class=\"max-w-full grow truncate overflow-hidden text-center\"\u003eCasio\u003c\/span\u003e\u003cspan class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\"\u003e+12\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\"\u003e\u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/Casio_V.P.A.M._calculators?utm_source=chatgpt.com\" rel=\"noopener\" alt=\"https:\/\/en.wikipedia.org\/wiki\/Casio_V.P.A.M._calculators?utm_source=chatgpt.com\" class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]! transition-colors duration-150 ease-in-out\" target=\"_blank\"\u003e\u003cspan class=\"relative start-0 bottom-0 flex h-full w-full items-center\"\u003e\u003cspan class=\"flex h-4 w-full items-center justify-between\"\u003e\u003cspan class=\"max-w-full grow truncate overflow-hidden text-center\"\u003eWikipedia\u003c\/span\u003e\u003cspan class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\"\u003e+1\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"192\" data-end=\"266\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003eCasio provides a built-in \u003cstrong data-start=\"26\" data-end=\"48\"\u003eauthenticity check\u003c\/strong\u003e: go to HOME → SETTINGS → OPTN to generate a QR code showing a 20-digit calculator ID. You can verify this on Casio’s official site to confirm the calculator is genuine.\u003c\/span\u003e\u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\"\u003e\u003ca href=\"https:\/\/edu.casio.com\/intl\/authenticity\/?utm_source=chatgpt.com\" rel=\"noopener\" alt=\"https:\/\/edu.casio.com\/intl\/authenticity\/?utm_source=chatgpt.com\" class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]! transition-colors duration-150 ease-in-out\" target=\"_blank\"\u003e\u003cspan class=\"relative start-0 bottom-0 flex h-full w-full items-center\"\u003e\u003cspan class=\"flex h-4 w-full items-center justify-between overflow-hidden\"\u003e\u003cspan class=\"max-w-full grow truncate overflow-hidden text-center\"\u003eCASIO WEW Worldwide Education Website\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr data-start=\"268\" data-end=\"271\"\u003e\n\u003ch2 data-start=\"273\" data-end=\"308\"\u003e🧮 Key Features \u0026amp; Specifications\u003c\/h2\u003e\n\u003cul data-start=\"310\" data-end=\"929\"\u003e\n\u003cli data-start=\"310\" data-end=\"388\"\u003e\n\u003cp data-start=\"312\" data-end=\"388\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003e\u003cstrong data-start=\"0\" data-end=\"27\" data-is-only-node=\"\"\u003e540+ built-in functions\u003c\/strong\u003e, including advanced algebra, calculus, matrix\/vector, complex numbers, spreadsheet, statistical regression, equation solving, probability, and more.\u003c\/span\u003e\u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\"\u003e\u003ca href=\"https:\/\/www.shi.com\/product\/45875203\/Casio-ClassWiz-FX-991CW?utm_source=chatgpt.com\" rel=\"noopener\" alt=\"https:\/\/www.shi.com\/product\/45875203\/Casio-ClassWiz-FX-991CW?utm_source=chatgpt.com\" class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]! transition-colors duration-150 ease-in-out\" target=\"_blank\"\u003e\u003cspan class=\"relative start-0 bottom-0 flex h-full w-full items-center\"\u003e\u003cspan class=\"flex h-4 w-full items-center justify-between overflow-hidden\"\u003e\u003cspan class=\"max-w-full grow truncate overflow-hidden text-center\"\u003eAccelerator\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"389\" data-end=\"430\"\u003e\n\u003cp data-start=\"391\" data-end=\"430\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003e\u003cstrong data-start=\"0\" data-end=\"28\" data-is-only-node=\"\"\u003eNatural Textbook Display\u003c\/strong\u003e shows expressions as they appear in textbooks.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"431\" data-end=\"472\"\u003e\n\u003cp data-start=\"433\" data-end=\"472\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003e\u003cstrong data-start=\"0\" data-end=\"12\" data-is-only-node=\"\"\u003eMath Box\u003c\/strong\u003e for fun learning simulations like dice rolls and coin tosses.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"473\" data-end=\"555\"\u003e\n\u003cp data-start=\"475\" data-end=\"555\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003e\u003cstrong data-start=\"0\" data-end=\"20\" data-is-only-node=\"\"\u003eSpreadsheet mode\u003c\/strong\u003e supports up to 5 columns × 45 rows (maximum of ~170 data items).\u003c\/span\u003e\u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\"\u003e\u003ca href=\"https:\/\/www.casioeducation.com\/scientific-calculators\/fx-991cw?utm_source=chatgpt.com\" rel=\"noopener\" alt=\"https:\/\/www.casioeducation.com\/scientific-calculators\/fx-991cw?utm_source=chatgpt.com\" class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]! transition-colors duration-150 ease-in-out\" target=\"_blank\"\u003e\u003cspan class=\"relative start-0 bottom-0 flex h-full w-full items-center\"\u003e\u003cspan class=\"flex h-4 w-full items-center justify-between absolute\"\u003e\u003cspan class=\"max-w-full grow truncate overflow-hidden text-center\"\u003eCASIO WEW Worldwide Education Website\u003c\/span\u003e\u003cspan class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\"\u003e+10\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"flex h-4 w-full items-center justify-between\"\u003e\u003cspan class=\"max-w-full grow truncate overflow-hidden text-center\"\u003eCasio Education\u003c\/span\u003e\u003cspan class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\"\u003e+10\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"flex h-4 w-full items-center justify-between absolute\"\u003e\u003cspan class=\"max-w-full grow truncate overflow-hidden text-center\"\u003egarnerstationery.com\u003c\/span\u003e\u003cspan class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\"\u003e+10\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\"\u003e\u003ca href=\"https:\/\/www.casio.com\/us\/scientific-calculators\/product.FX-991CW\/?utm_source=chatgpt.com\" rel=\"noopener\" alt=\"https:\/\/www.casio.com\/us\/scientific-calculators\/product.FX-991CW\/?utm_source=chatgpt.com\" class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]! transition-colors duration-150 ease-in-out\" target=\"_blank\"\u003e\u003cspan class=\"relative start-0 bottom-0 flex h-full w-full items-center\"\u003e\u003cspan class=\"flex h-4 w-full items-center justify-between absolute\"\u003e\u003cspan class=\"max-w-full grow truncate overflow-hidden text-center\"\u003egarnerstationery.com\u003c\/span\u003e\u003cspan class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\"\u003e+8\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"flex h-4 w-full items-center justify-between\"\u003e\u003cspan class=\"max-w-full grow truncate overflow-hidden text-center\"\u003eCasio\u003c\/span\u003e\u003cspan class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\"\u003e+8\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"flex h-4 w-full items-center justify-between absolute\"\u003e\u003cspan class=\"max-w-full grow truncate overflow-hidden text-center\"\u003eCasio\u003c\/span\u003e\u003cspan class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\"\u003e+8\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"556\" data-end=\"599\"\u003e\n\u003cp data-start=\"558\" data-end=\"599\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003e\u003cstrong data-start=\"0\" data-end=\"16\" data-is-only-node=\"\"\u003eEquation app\u003c\/strong\u003e includes simultaneous and polynomial solvers up to 4 variables or 4th degree.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"600\" data-end=\"682\"\u003e\n\u003cp data-start=\"602\" data-end=\"682\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003e\u003cstrong data-start=\"0\" data-end=\"28\" data-is-only-node=\"\"\u003eC‑catalogue \u0026amp; TOOLS menu\u003c\/strong\u003e, cursor navigation, and improved key layout vs older ClassWiz models.\u003c\/span\u003e\u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\"\u003e\u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/Casio_V.P.A.M._calculators?utm_source=chatgpt.com\" rel=\"noopener\" alt=\"https:\/\/en.wikipedia.org\/wiki\/Casio_V.P.A.M._calculators?utm_source=chatgpt.com\" class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]! transition-colors duration-150 ease-in-out\" target=\"_blank\"\u003e\u003cspan class=\"relative start-0 bottom-0 flex h-full w-full items-center\"\u003e\u003cspan class=\"flex h-4 w-full items-center justify-between\"\u003e\u003cspan class=\"max-w-full grow truncate overflow-hidden text-center\"\u003eWikipedia\u003c\/span\u003e\u003cspan class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\"\u003e+1\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\"\u003e\u003ca href=\"https:\/\/edu.casio.com\/intl\/calculators\/scientific\/fx991cw\/?utm_source=chatgpt.com\" rel=\"noopener\" alt=\"https:\/\/edu.casio.com\/intl\/calculators\/scientific\/fx991cw\/?utm_source=chatgpt.com\" class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]! transition-colors duration-150 ease-in-out\" target=\"_blank\"\u003e\u003cspan class=\"relative start-0 bottom-0 flex h-full w-full items-center\"\u003e\u003cspan class=\"flex h-4 w-full items-center justify-between absolute\"\u003e\u003cspan class=\"max-w-full grow truncate overflow-hidden text-center\"\u003eWikipedia\u003c\/span\u003e\u003cspan class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\"\u003e+12\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"flex h-4 w-full items-center justify-between\"\u003e\u003cspan class=\"max-w-full grow truncate overflow-hidden text-center\"\u003eCASIO WEW Worldwide Education Website\u003c\/span\u003e\u003cspan class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\"\u003e+12\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"flex h-4 w-full items-center justify-between absolute\"\u003e\u003cspan class=\"max-w-full grow truncate overflow-hidden text-center\"\u003eWikipedia\u003c\/span\u003e\u003cspan class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\"\u003e+12\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"683\" data-end=\"765\"\u003e\n\u003cp data-start=\"685\" data-end=\"765\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003e\u003cstrong data-start=\"0\" data-end=\"37\" data-is-only-node=\"\"\u003eHigh-precision calculation engine\u003c\/strong\u003e: up to 23-digit internal precision and 60-bit floating point.\u003c\/span\u003e\u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\"\u003e\u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/Casio_V.P.A.M._calculators?utm_source=chatgpt.com\" rel=\"noopener\" alt=\"https:\/\/en.wikipedia.org\/wiki\/Casio_V.P.A.M._calculators?utm_source=chatgpt.com\" class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]! transition-colors duration-150 ease-in-out\" target=\"_blank\"\u003e\u003cspan class=\"relative start-0 bottom-0 flex h-full w-full items-center\"\u003e\u003cspan class=\"flex h-4 w-full items-center justify-between\"\u003e\u003cspan class=\"max-w-full grow truncate overflow-hidden text-center\"\u003eWikipedia\u003c\/span\u003e\u003cspan class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\"\u003e+1\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"766\" data-end=\"848\"\u003e\n\u003cp data-start=\"768\" data-end=\"848\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003e\u003cstrong data-start=\"0\" data-end=\"14\" data-is-only-node=\"\"\u003eDual power\u003c\/strong\u003e: solar cell + LR44 battery ensures long-lasting power.\u003c\/span\u003e\u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\"\u003e\u003ca href=\"https:\/\/www.compsource.com\/pn\/FX991CW\/Casio-82\/Casio-Classwiz-Cw-Fx991cw-Scientific-Calculator--540-Functions--Lcd-Display-Plastic-Key--Flash--Fx991cw\/?utm_source=chatgpt.com\" rel=\"noopener\" alt=\"https:\/\/www.compsource.com\/pn\/FX991CW\/Casio-82\/Casio-Classwiz-Cw-Fx991cw-Scientific-Calculator--540-Functions--Lcd-Display-Plastic-Key--Flash--Fx991cw\/?utm_source=chatgpt.com\" class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]! transition-colors duration-150 ease-in-out\" target=\"_blank\"\u003e\u003cspan class=\"relative start-0 bottom-0 flex h-full w-full items-center\"\u003e\u003cspan class=\"flex h-4 w-full items-center justify-between\"\u003e\u003cspan class=\"max-w-full grow truncate overflow-hidden text-center\"\u003ecompsource.com\u003c\/span\u003e\u003cspan class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\"\u003e+1\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"849\" data-end=\"929\"\u003e\n\u003cp data-start=\"851\" data-end=\"929\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003e\u003cstrong data-start=\"0\" data-end=\"14\" data-is-only-node=\"\"\u003eDimensions\u003c\/strong\u003e: approximately 162 × 77 × 10.7 mm, weight around 90 g.\u003c\/span\u003e\u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\"\u003e\u003ca href=\"https:\/\/www.shi.com\/product\/45875203\/Casio-ClassWiz-FX-991CW?utm_source=chatgpt.com\" rel=\"noopener\" alt=\"https:\/\/www.shi.com\/product\/45875203\/Casio-ClassWiz-FX-991CW?utm_source=chatgpt.com\" class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]! transition-colors duration-150 ease-in-out\" target=\"_blank\"\u003e\u003cspan class=\"relative start-0 bottom-0 flex h-full w-full items-center\"\u003e\u003cspan class=\"flex h-4 w-full items-center justify-between overflow-hidden\"\u003e\u003cspan class=\"max-w-full grow truncate overflow-hidden text-center\"\u003eAccelerator\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"931\" data-end=\"934\"\u003e\n\u003ch2 data-start=\"936\" data-end=\"963\"\u003e📌 Is It the “Original”?\u003c\/h2\u003e\n\u003cp data-start=\"965\" data-end=\"1043\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003eIf you're looking for the officially released \u003cstrong data-start=\"46\" data-end=\"64\"\u003eblack fx‑991CW\u003c\/strong\u003e, this is it—\u003cstrong data-start=\"77\" data-end=\"116\"\u003enot a clone or older fx‑991EX or ES\u003c\/strong\u003e. Look for the CW logo and 4‑level display. The packaging may not always carry holograms, but the calculator itself will generate a QR code for authenticity checking.\u003c\/span\u003e\u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\"\u003e\u003ca href=\"https:\/\/edu.casio.com\/intl\/calculators\/scientific\/fx991cw\/?utm_source=chatgpt.com\" rel=\"noopener\" alt=\"https:\/\/edu.casio.com\/intl\/calculators\/scientific\/fx991cw\/?utm_source=chatgpt.com\" class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]! transition-colors duration-150 ease-in-out\" target=\"_blank\"\u003e\u003cspan class=\"relative start-0 bottom-0 flex h-full w-full items-center\"\u003e\u003cspan class=\"flex h-4 w-full items-center justify-between absolute\"\u003e\u003cspan class=\"max-w-full grow truncate overflow-hidden text-center\"\u003eYouTube\u003c\/span\u003e\u003cspan class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\"\u003e+12\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"flex h-4 w-full items-center justify-between\"\u003e\u003cspan class=\"max-w-full grow truncate overflow-hidden text-center\"\u003eCASIO WEW Worldwide Education Website\u003c\/span\u003e\u003cspan class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\"\u003e+12\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"flex h-4 w-full items-center justify-between absolute\"\u003e\u003cspan class=\"max-w-full grow truncate overflow-hidden text-center\"\u003eCASIO WEW Worldwide Education Website\u003c\/span\u003e\u003cspan class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\"\u003e+12\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr data-start=\"1045\" data-end=\"1048\"\u003e\n\u003ch2 data-start=\"1050\" data-end=\"1068\"\u003e✅ Summary Table\u003c\/h2\u003e\n\u003cdiv class=\"_tableContainer_16hzy_1\"\u003e\n\u003cdiv class=\"_tableWrapper_16hzy_14 group flex w-fit flex-col-reverse\" tabindex=\"-1\"\u003e\n\u003ctable data-start=\"1070\" data-end=\"1624\" class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead data-start=\"1070\" data-end=\"1103\"\u003e\n\u003ctr data-start=\"1070\" data-end=\"1103\"\u003e\n\u003cth data-start=\"1070\" data-end=\"1092\" data-col-size=\"sm\"\u003eFeature\u003c\/th\u003e\n\u003cth data-start=\"1092\" data-end=\"1103\" data-col-size=\"sm\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-start=\"1138\" data-end=\"1624\"\u003e\n\u003ctr data-start=\"1138\" data-end=\"1203\"\u003e\n\u003ctd data-start=\"1138\" data-end=\"1160\" data-col-size=\"sm\"\u003eDisplay\u003c\/td\u003e\n\u003ctd data-start=\"1160\" data-end=\"1203\" data-col-size=\"sm\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003e192×63 pixel, 4‑tone grayscale\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1204\" data-end=\"1269\"\u003e\n\u003ctd data-start=\"1204\" data-end=\"1226\" data-col-size=\"sm\"\u003eFunctions\u003c\/td\u003e\n\u003ctd data-start=\"1226\" data-end=\"1269\" data-col-size=\"sm\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003e540+ across math, stats, matrices, vectors, complex, equation solving\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1270\" data-end=\"1335\"\u003e\n\u003ctd data-start=\"1270\" data-end=\"1292\" data-col-size=\"sm\"\u003ePower\u003c\/td\u003e\n\u003ctd data-start=\"1292\" data-end=\"1335\" data-col-size=\"sm\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003eSolar + LR44 battery\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1336\" data-end=\"1426\"\u003e\n\u003ctd data-start=\"1336\" data-end=\"1383\" data-col-size=\"sm\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003eBuilt‑in tools\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"1383\" data-end=\"1426\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003eMath Box, spreadsheet, equation solver\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1427\" data-end=\"1492\"\u003e\n\u003ctd data-start=\"1427\" data-end=\"1449\" data-col-size=\"sm\"\u003ePrecision\u003c\/td\u003e\n\u003ctd data-start=\"1449\" data-end=\"1492\" data-col-size=\"sm\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003e23 digits \/ 60‑bit floating point\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1493\" data-end=\"1558\"\u003e\n\u003ctd data-start=\"1493\" data-end=\"1515\" data-col-size=\"sm\"\u003eAuthenticity check\u003c\/td\u003e\n\u003ctd data-start=\"1515\" data-end=\"1558\" data-col-size=\"sm\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003eQR code + model ID\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1559\" data-end=\"1624\"\u003e\n\u003ctd data-start=\"1559\" data-end=\"1581\" data-col-size=\"sm\"\u003eSize \u0026amp; weight\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"1581\" data-end=\"1624\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003e~162×77×10.7 mm, 90 g\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cdiv class=\"sticky end-(--thread-content-margin) h-0 self-end select-none\"\u003e\n\u003cdiv class=\"absolute end-0 flex items-end\"\u003e\u003cspan class=\"\" data-state=\"closed\"\u003e\u003cbutton aria-label=\"Copy Table\" class=\"hover:bg-token-bg-tertiary text-token-text-secondary my-1 rounded-sm p-1 transition-opacity group-[:not(:hover):not(:focus-within)]:pointer-events-none group-[:not(:hover):not(:focus-within)]:opacity-0\"\u003e\u003csvg width=\"20\" height=\"20\" viewbox=\"0 0 20 20\" fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"icon\"\u003e\u003cpath d=\"M12.668 10.667C12.668 9.95614 12.668 9.46258 12.6367 9.0791C12.6137 8.79732 12.5758 8.60761 12.5244 8.46387L12.4688 8.33399C12.3148 8.03193 12.0803 7.77885 11.793 7.60254L11.666 7.53125C11.508 7.45087 11.2963 7.39395 10.9209 7.36328C10.5374 7.33197 10.0439 7.33203 9.33301 7.33203H6.5C5.78896 7.33203 5.29563 7.33195 4.91211 7.36328C4.63016 7.38632 4.44065 7.42413 4.29688 7.47559L4.16699 7.53125C3.86488 7.68518 3.61186 7.9196 3.43555 8.20703L3.36524 8.33399C3.28478 8.49198 3.22795 8.70352 3.19727 9.0791C3.16595 9.46259 3.16504 9.95611 3.16504 10.667V13.5C3.16504 14.211 3.16593 14.7044 3.19727 15.0879C3.22797 15.4636 3.28473 15.675 3.36524 15.833L3.43555 15.959C3.61186 16.2466 3.86474 16.4807 4.16699 16.6348L4.29688 16.6914C4.44063 16.7428 4.63025 16.7797 4.91211 16.8027C5.29563 16.8341 5.78896 16.835 6.5 16.835H9.33301C10.0439 16.835 10.5374 16.8341 10.9209 16.8027C11.2965 16.772 11.508 16.7152 11.666 16.6348L11.793 16.5645C12.0804 16.3881 12.3148 16.1351 12.4688 15.833L12.5244 15.7031C12.5759 15.5594 12.6137 15.3698 12.6367 15.0879C12.6681 14.7044 12.668 14.211 12.668 13.5V10.667ZM13.998 12.665C14.4528 12.6634 14.8011 12.6602 15.0879 12.6367C15.4635 12.606 15.675 12.5492 15.833 12.4688L15.959 12.3975C16.2466 12.2211 16.4808 11.9682 16.6348 11.666L16.6914 11.5361C16.7428 11.3924 16.7797 11.2026 16.8027 10.9209C16.8341 10.5374 16.835 10.0439 16.835 9.33301V6.5C16.835 5.78896 16.8341 5.29563 16.8027 4.91211C16.7797 4.63025 16.7428 4.44063 16.6914 4.29688L16.6348 4.16699C16.4807 3.86474 16.2466 3.61186 15.959 3.43555L15.833 3.36524C15.675 3.28473 15.4636 3.22797 15.0879 3.19727C14.7044 3.16593 14.211 3.16504 13.5 3.16504H10.667C9.9561 3.16504 9.46259 3.16595 9.0791 3.19727C8.79739 3.22028 8.6076 3.2572 8.46387 3.30859L8.33399 3.36524C8.03176 3.51923 7.77886 3.75343 7.60254 4.04102L7.53125 4.16699C7.4508 4.32498 7.39397 4.53655 7.36328 4.91211C7.33985 5.19893 7.33562 5.54719 7.33399 6.00195H9.33301C10.022 6.00195 10.5791 6.00131 11.0293 6.03809C11.4873 6.07551 11.8937 6.15471 12.2705 6.34668L12.4883 6.46875C12.984 6.7728 13.3878 7.20854 13.6533 7.72949L13.7197 7.87207C13.8642 8.20859 13.9292 8.56974 13.9619 8.9707C13.9987 9.42092 13.998 9.97799 13.998 10.667V12.665ZM18.165 9.33301C18.165 10.022 18.1657 10.5791 18.1289 11.0293C18.0961 11.4302 18.0311 11.7914 17.8867 12.1279L17.8203 12.2705C17.5549 12.7914 17.1509 13.2272 16.6553 13.5313L16.4365 13.6533C16.0599 13.8452 15.6541 13.9245 15.1963 13.9619C14.8593 13.9895 14.4624 13.9935 13.9951 13.9951C13.9935 14.4624 13.9895 14.8593 13.9619 15.1963C13.9292 15.597 13.864 15.9576 13.7197 16.2939L13.6533 16.4365C13.3878 16.9576 12.9841 17.3941 12.4883 17.6982L12.2705 17.8203C11.8937 18.0123 11.4873 18.0915 11.0293 18.1289C10.5791 18.1657 10.022 18.165 9.33301 18.165H6.5C5.81091 18.165 5.25395 18.1657 4.80371 18.1289C4.40306 18.0962 4.04235 18.031 3.70606 17.8867L3.56348 17.8203C3.04244 17.5548 2.60585 17.151 2.30176 16.6553L2.17969 16.4365C1.98788 16.0599 1.90851 15.6541 1.87109 15.1963C1.83431 14.746 1.83496 14.1891 1.83496 13.5V10.667C1.83496 9.978 1.83432 9.42091 1.87109 8.9707C1.90851 8.5127 1.98772 8.10625 2.17969 7.72949L2.30176 7.51172C2.60586 7.0159 3.04236 6.6122 3.56348 6.34668L3.70606 6.28027C4.04237 6.136 4.40303 6.07083 4.80371 6.03809C5.14051 6.01057 5.53708 6.00551 6.00391 6.00391C6.00551 5.53708 6.01057 5.14051 6.03809 4.80371C6.0755 4.34588 6.15483 3.94012 6.34668 3.56348L6.46875 3.34473C6.77282 2.84912 7.20856 2.44514 7.72949 2.17969L7.87207 2.11328C8.20855 1.96886 8.56979 1.90385 8.9707 1.87109C9.42091 1.83432 9.978 1.83496 10.667 1.83496H13.5C14.1891 1.83496 14.746 1.83431 15.1963 1.87109C15.6541 1.90851 16.0599 1.98788 16.4365 2.17969L16.6553 2.30176C17.151 2.60585 17.5548 3.04244 17.8203 3.56348L17.8867 3.70606C18.031 4.04235 18.0962 4.40306 18.1289 4.80371C18.1657 5.25395 18.165 5.81091 18.165 6.5V9.33301Z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/button\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr data-start=\"1626\" data-end=\"1629\"\u003e\n\u003ch2 data-start=\"1631\" data-end=\"1662\"\u003e🎥 Want to See It in Action?\u003c\/h2\u003e\n\u003cp data-start=\"1664\" data-end=\"1742\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003eYou can find \u003cstrong data-start=\"13\" data-end=\"51\"\u003eYouTube unboxing and review videos\u003c\/strong\u003e that walk through its interface, function menus, Math Box, and real‑use examples. Search “Casio fx‑991CW review” or similar terms—very useful if you're verifying a purchase or learning to use it.\u003c\/span\u003e\u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\"\u003e\u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/Casio_V.P.A.M._calculators?utm_source=chatgpt.com\" rel=\"noopener\" alt=\"https:\/\/en.wikipedia.org\/wiki\/Casio_V.P.A.M._calculators?utm_source=chatgpt.com\" class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]! transition-colors duration-150 ease-in-out\" target=\"_blank\"\u003e\u003cspan class=\"relative start-0 bottom-0 flex h-full w-full items-center\"\u003e\u003cspan class=\"flex h-4 w-full items-center justify-between overflow-hidden\"\u003e\u003cspan class=\"max-w-full grow truncate overflow-hidden text-center\"\u003eWikipedia\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\"\u003e\u003ca href=\"https:\/\/www.amazon.com\/Casio-FX-991CW-Advanced-Scientific-Calculator\/dp\/B0BSJ33C4R?utm_source=chatgpt.com\" rel=\"noopener\" alt=\"https:\/\/www.amazon.com\/Casio-FX-991CW-Advanced-Scientific-Calculator\/dp\/B0BSJ33C4R?utm_source=chatgpt.com\" class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]! transition-colors duration-150 ease-in-out\" target=\"_blank\"\u003e\u003cspan class=\"relative start-0 bottom-0 flex h-full w-full items-center\"\u003e\u003cspan class=\"flex h-4 w-full items-center justify-between overflow-hidden\"\u003e\u003cspan class=\"max-w-full grow truncate overflow-hidden text-center\"\u003eAmazon\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\"\u003e\u003ca href=\"https:\/\/www.youtube.com\/watch?v=08-0ke8KEeE\u0026amp;utm_source=chatgpt.com\" rel=\"noopener\" alt=\"https:\/\/www.youtube.com\/watch?v=08-0ke8KEeE\u0026amp;utm_source=chatgpt.com\" class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]! transition-colors duration-150 ease-in-out\" target=\"_blank\"\u003e\u003cspan class=\"relative start-0 bottom-0 flex h-full w-full items-center\"\u003e\u003cspan class=\"flex h-4 w-full items-center justify-between absolute\"\u003e\u003cspan class=\"max-w-full grow truncate overflow-hidden text-center\"\u003eCASIO WEW Worldwide Education Website\u003c\/span\u003e\u003cspan class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\"\u003e+14\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"flex h-4 w-full items-center justify-between\"\u003e\u003cspan class=\"max-w-full grow truncate overflow-hidden text-center\"\u003eYouTube\u003c\/span\u003e\u003cspan class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\"\u003e+14\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"flex h-4 w-full items-center justify-between absolute\"\u003e\u003cspan class=\"max-w-full grow truncate overflow-hidden text-center\"\u003eAmazon\u003c\/span\u003e\u003cspan class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\"\u003e+14\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr data-start=\"1744\" data-end=\"1747\"\u003e\n\u003ch3 data-start=\"1749\" data-end=\"1770\"\u003e📝 Final Thoughts\u003c\/h3\u003e\n\u003cp data-start=\"1772\" data-end=\"2155\"\u003eThe \u003cstrong data-start=\"1776\" data-end=\"1803\"\u003eCasio fx‑991CW ClassWiz\u003c\/strong\u003e is a fully featured, exam‑friendly scientific calculator built for clarity, speed, and functionality. If you’re buying it, ensure it's the CW—not a previous EX\/ES variant—by checking its display style, CW labeling, and performing the QR‑based authenticity test. Let me know if you need help using any specific functions or distinctions between models!\u003c\/p\u003e","brand":"Fareed Book Centre","offers":[{"title":"Default Title","offer_id":52048172089662,"sku":null,"price":8190.0,"currency_code":"PKR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0667\/9337\/4014\/files\/Untitleddesign_3_6c8d4396-f012-4e07-b5e6-c6af3f37971d.webp?v=1754401909","url":"https:\/\/global.fareedbookcentre.com\/products\/casio-fx-991cw-original","provider":"Fareed Book Centre","version":"1.0","type":"link"}