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A calculator is placed on top of a stack of books, one of which is titled 'Chemistry'. An open book with text and diagrams is positioned in the background, suggesting a study or work environment. There are additional items like a small bottle and a tube nearby.
A person is holding a calculator-like device over an open document with printed text. There is a pen and some papers on the table, and a thermal travel mug in the background.
A close-up view of various hand tools and measuring devices, including a folded ruler with visible numerical markings and a large metallic tool with a cylindrical grip. The tools are arranged casually on a table, suggesting a workshop or garage setting.

Comprehensive Calculation Tools

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A vintage mechanical calculator with a black metal body, featuring rows of numbers and levers for manual calculations. The brand 'Thales' is prominently displayed in elegant script on the top section. The device rests on a wooden surface, showcasing its intricate design and historical significance.
A scientific calculator is placed on top of a desk alongside a textbook and some notes. The calculator display shows some trigonometric calculations. The textbook page features a diagram explaining the concept of reflection, with terms like angle of incidence and angle of reflection. The surroundings contain other academic materials, suggesting a study environment.