It is clear from Part 1 that in order to calculate π we are going to need a better method than evaluating Gregory's Series. Fun with Maths and Python This is a having fun with maths and python article. See the introduction for important information! Here is one which was originally discovered by Archimedes in 200BC. Most of the proofs for series for calculating π require calculus or other advanced math, but since Archimedes didn't know any of those you can prove it without!