User manual

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Calculator
In "Calculator", you can add, subtract, multiply, and divide. You can also
do math in exponential functions, logarithmic functions, trigonometric
functions, etc., as well as online exchange rate, length, area, volume,
speed, weight, temperature, power, pressure, and other unit
conversions.
Numeric Calculation
Basic Calculation
 In "Calculator", you can perform basic calculations such as addition,
subtraction, multiplication, and division.
 Tap (C) to clear the numbers in the current display.
 Slide the keypad down to see history records of calculation.