3.1415927, which I memorized in 10th grade (just a hair more accurate than 335/113) has always been more than adequate for every engineering task I've ever had

3.1415927, which I memorized in 10th grade (just a hair more accurate than 335/113) has always been more than adequate for every engineering task I've ever had to engage in - including those in the aerospace industry (both rockets and planes/jet engines), and the oilfield industry (all kinds of stuff, including precision sensors).