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ost_uid0][quote

ost_uid0]There must be a formula of some sort - otherwise Spock wouldn't have been to figure out the numbers that he did.[/quote

ost_uid0]
Perhaps he just made it up, and nobody bothered to check anything in order to gainsay him.
Possibly he assumed that every tribble on the Enterprise was being gorged by adoring crewmen, and that the food supply was infinite, or at least orders of magnitude greater than required. They did have access to a starbase stuffed to the gunwales with grain, after all.[/color

ost_uid0]