Pi was already being approximated by Archimedes and Co. some time ago, I don't think its outside of the realm of possibility that a modern developer looks up fo

Pi was already being approximated by Archimedes and Co. some time ago, I don't think its outside of the realm of possibility that a modern developer looks up following inequality and just approximates pi to some degree of accuracy with P/(2*r) > Pi > P/(2*R) Once you have approximated it, returning a string with the first x digits is trivial