What is pie formula in math

P. s. if you're using a calculator do don't just multiply by 3.14. you can press shift and then a button that looks like 10^x that will give you the actual pie value and so you can multiply and get accurate results

The circumference of a circle is found with the formula C = π*d = 2*π*r. Thus pi equals a circle's circumference divided by its diameter. Plug your numbers into a calculator: the result should be roughly 3.14.