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A calculator is a versatile device designed to perform a wide range of mathematical operations, from basic arithmetic to advanced scientific calculations. Available in various types, such as basic, scientific, financial, and graphing models, calculators cater to the needs of students, professionals, and engineers alike. Featuring a compact design, durable build, and user-friendly interface, modern calculators often include large, easy-to-read displays, ergonomic keypads, and dual power sources for convenience. Whether solving everyday math problems or handling complex computations, a calculator is an essential tool for accuracy and efficiency in academics, offices, and beyond.