Hehehe... Vectrex....
Hehe... Honestly I usually tend to not really say one way or the other. Like I said, gender is silly. :P
Yeah I was thinking (100 - mdef) / 100..0 too at some point. Same result really.
And yeah I remembered something about that part way though my post. It's cause I remember the order though PEMDAS, which implies multiplication comes first. I still say interfix notation is dumb though. Prefix and postfix notation make waaay more sense. I like postfix in particular because it's basically stack machine logic.
Edit: I am not sure what having a minimum damage of 0 has to do with multihits, I am just saying that if XP doesn't do that already it would be a good idea so you arn't healed by weak attacks.