[Blarg]

Mostly it's very simple addition and division, you just have to do it quickly.

It can get you flustered if you don't have the odds down cold, or just because of the speed it can all happen at. Like most things, though, practice makes all the difference. You'll probably get comfy with it after a while. I felt okay doing two tables right away, but three and especially four tables it took me quite a while to get used to. You'll get there eventually.