People can't count to numbers far lower than that. Once you get beyond a number that someone can comfortably visualize, they all fall into the nebulous concept "A Lot" or "A Whole Lot". (We are visual creatures after all)

Its like the old standby you used to see in stores.......

Guess the number of Jelly Beans in the container and win the prize. The delta between the highest and lowest guesses are shocking.

Every single time.