Retard system

Yeah, the US inherited the asinine measurement system used in Europe, but then didn't adopt the better one commissioned by Napoleon. Sadly, Americans have to remember numbers like 12 inches in a foot, 5280 feet in a mile, or four quarts in a gallon. Thankfully, much of the rest of the world doesn't have to,waste their valuable brain cells on such things, although if that's too much of a task you might want to reasses your memorization skills.