Could you try using 3x3 instead of 3*3? That reason for this is that the latter one makes it CURSIVE instead of showing it. That may make it easier to understand your concerns...

And yes, the battery part is correct. I think you should redo the 2nd part with the x's instead of *'s though... Then I might be able to help.

I tried solving it myself and got it correct, but I might just be repeating the same mistake :P