Constants

there are 2 build in math constants: PI(3.141592653589793), Euler(2.718281828459045).

Example 1: Calculate the circumference of a circle, which has a radius of 3.

1. Make sure Input Number Format is: Dec

2. Input the expression: 2*Pi*3

   or click buttons sequently: 2, *, Pi, *, 3

3. Make sure Output Number Format is: Dec

4. Result is: 18.84955592153876