Problem topics asking and answering!

HIYA THERE! If you are nice and smart, you probably can play this game.
Rules:

If you get a problem wrong, the person below must say NO to you in red. If its correct, don't do anything.
After you answer a problem whoever told you above, you should make up a problem (Anything but has to be capable to answer.)
Don't bring up any stupid problems even if you do. I just don't like it.
Make a problem with numbers (if you wanted), letters, and maybe symbols but only a certain number of them.

Ok, but the first one must answer my problem:
39x3=?