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11. Calculator
To open Calculator on the Home screen touch and select the Calculator icon.
Use the calculator to perform basic calculations by entering numbers and perform basic addition,
subtraction, multiplication, and division. Also, the advanced operators & delimiters such as sine,
cosine, tangent, square root, parentheses, etc. can also be used.
To delete numbers, one at a time, touch CLEAR on the screen.
11.3 ES File Explorer