It's just about frames of reference. Just because 9/5*C+32=F doesn't mean people will instantly know what you mean when you say 20 degrees C. Likewise, a 20m2 d

It's just about frames of reference. Just because 9/5*C+32=F doesn't mean people will instantly know what you mean when you say 20 degrees C. Likewise, a 20m2 doesn't mean as much to people used to hearing 550f2