Which number(s)?
They'd be competitive with a 50% devaluation, don't you think?
Imports would tank.
They'd be free of the mean troika.
Win-win.
Imports would indeed tank, and Greece's economy would be effectively back where it was in about 1906.
Oh, and keep in mind that Greek debt, which, on a proportional basis DWARFS the US debt (think about that for a minute...) would have to -- completely as part of the bargain to redrachmatise -- be forgiven or defaulted upon. Good luck to the Euroturds in solving THAT little problem.
Unemployment would de facto vanish: every able-bodied person would be growing food to stave off starvation until (sigh...) US food aid arrives.