306
just some dice I threw around. nothing to see here
(lemmy.blahaj.zone)
Alt text: Five dices. Top left corner is a three, top right corner is a six, bottom left corner is also a six and bottom right corner is two threes forming a straight angle.
If it's limited to basic arithmetic (+-*/) and no parenthesis, would there be any answer possible that's not a multiple of 3? My first thought is telling me that common order of operations would make any equation using the numbers in the OP and the restrictions laid out would always amount to a multiple of 3.
Oh yep, my bad. It's always division that throws me in math expressions that have multiple steps to them.