I remember seeing a documentary where there was a bit about some guy who' life's work was computing pi to 30 digits. Imagine all that time to do what my computer can do in less than a second + a day or two to write the code using the algorithm he used. 10 min if you use newton's

You’re likely thinking of the Veritasium episode https://youtu.be/gMlf1ELvRzc?si=Qwevl2GwHCzSFcsQ