<s>[INST] how is the precise value of pi calculated? [/INST] There are several different ways to calculate pi, but since pi has an infinite number of decimal places it is impossible to obtain a definitive answer. A simple way to calculate pi is to use the Gregory-Leibniz series. To do this you need to calculate this formula: π=(4/1)-(4/3)+(4/5)-(4/7)+(4/9)-(4/11)+(4/13)-(4/15) ⋯
The longer the formula you use, the more precise the answer will be.</s>\ <s>[INST] I know that there exist supercomputers that compute new digits to Pi. They must have some algorithm to compute Pi. Can you tell me which algorithm these supercomputers use? [/INST] As of 2022, Pi is usually calculated with the program y-cruncher, witch is based on the Chudnovsky algorithm.</s>