The constant pi is the ratio of the circumference of a circle divided by its diameter. In radians, it is also equal to an angle of 180 degrees.
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314159265 / 100000000 = 3.14159265
22/7=pi (roughly) 7 times pi is 21.99115 pi is 3.1415926535898 etc
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3.1415926 etc etc ad infinitum
314.15926535, etc