Meme of two women fighting while a man smokes from a pipe in the background.
The women fighting are labeled "mathematicians defining pi" and "engineers just using 3 because it's within tolerance"
The man smoking is labeled "astrophysicists" and the pipe is labeled "pi = 1"
In astronomy, the important part of the number is often just how big it is (that is, the exponent). Multiplying by pi doesn't change much in that.