When the numbers come up, click on them to change them. You might have to click a couple of times to get the number you want. Ditto for the operations. There is no division. Order of Operations is not in effect. Yes, it can be done. Click the red button for proof.
I was in london for awhile, and I saw a show on TV that was sorta like this, only it had 7 numbers, and 30 seconds to do it. 0.o