A lawyer dies and stands in front of St. Peter at the Pearly Gates. St. Peter says, "Lawyers can't come in here... you have to go to the other place." But the lawyer is really good at what he does and pleads his case so eloquently that St. Peter finally says, "Well...OK... here's what I'll do. You will spend the same amount of time in Hell as you did on Earth, and then you can spend the rest of eternity up here."
The lawyer figures this isn't a bad deal at all, so he says, "OK, it's a deal."
St. Peter then says, "Great... I'll see you in 400 years.".
The lawyer says, "Wait a minute! How is that possible... I only spent 80 years on Earth! ".
"Simple," St Peter replies, "We go by the way you billed your time."