I beg to differ. My cornbread is made in a antique skillet. It is as round as any Pi. ;-)
Daddy asks, "Well, Beau, what did you get teached in college?"
Beau: "I learnt, πr-squared".
Daddy, angrily: "That's ridiculous—We sent you to college for that?
Pie are round! Corn bread are square".