One of the earliest known records of pi was written by an Egyptian scribe named Ahmes (c. 1650 B.C.) on what is now known as the Rhind Papyrus. He was off by less than 1% of the modern approximation of pi (3.141592).
A hundred years from now when you are alone in your grave, no one will care how much money you had, what car you drove or what kind of house you lived in. The only thing that will matter then will be your righteous deeds.