Press space to start. Enter a number 100,000 or bigger. Warning: Even on turbo mode, the calculations take a long time.
Thanks to the book Fermat's last thereom that gave the formula for working it out! The formula is pi = 4(1/1 - 1/3 + 1/5 - 1/7 + 1/9 - 1/11 + 1/13...) . The larger the number you enter the closer to pi you get but the longer the computer takes, if you see no changes, wait patiently, the program may take around 5 minutes even if you only add only a few digits to the minimum 100,000!
