Not dumb pmac, not dumb. They said Meyer Lansky was a Calculator. When a human being is referred to as a Calculator, that refers to a person that can hold vast amounts of numbers all in their head and do mathematical calculations all in their brain. They don't need pen and paper or a computer. Warren Buffet is also called a Calculator. Warren Buffet was the Richest Man in the World, once upon a time. And he's still doing pretty good.

Lucky Luciano said that it takes just as much brains to run an illegitimate business as a legitimate one.

Lucky Luciano could not be cheated out of money because he always knew what his cut was on any given racket he owned a part of. You couldn't drop off a light envelope. He would catch it.

But a legitimate business man can keep his information on paper, in files, on hard drives, etc. A competent mafia Boss must keep everything in their head.