Unlimited Precision

Everyone reading this article will be familiar with calculators. One of the problems we face using them is that they have a limited precision: usually $8$ digits, sometimes $10$. If you need to know that $\pi$ to $50$ places is $$3.1415 92653 58979 32384 62643 38327 95028 84197 16939 93751,$$ then a calculator is of no use.