Maybe things changed by when I was in school PI was 3.14, the radius of a 2" ram is 1" 1 squared is still one times PI = 3.14 times 2000 = 6280 PSI. I changed my major from pre engineering to accounting and pre law. Maybe it was because I was dumb. And I got my degree over 40 years ago. Lots of brain cells have died off since then.
