I'm not sure that's the math I want them working on. I'd rather have them decide this is going to be more painful than it's worth to them. That, of course, is assuming they've already attacked.Besides running away, you can:
1. Play defense an try to block your opponent's punches and kicks.
2. Take your opponent down and then run away.
3. Control your opponent and wait for help.
4. Make your opponent to run away from you.
5. ...
I like option 1. If my opponent realizes that I have no intention to hurt him, and also he finds out that it's not that easy to hurt me, he may not want to fight me any more.
For option 2, in SC, we train how to take our opponents down and then run away at the same time.