> 60 is the highest round number I can think of being divisible by three. Now I start having problems keeping all the numbers in my head, but I manage after a few moments. Result is now 13460, and I'm left with 24, which divided by three is 8, so the final result is 13468.

Of course, I manage to mess it up when I have to type it all. I got hung up in the 60, and forgot to divide it by three before adding it to the result, which, of course, is 13428.

Trav"got it right in my head, though"holt.