Hello! All we have to do here is multiply from left to right. The whole problem with the numbers inserted is 10 * 2 * 1. 10 * 2 is 20 and 20 * 1 is 20. I got 20, but for some reason, that answer is not up there. It seems like the answer choices could be wrong, because the other answers don't make sense. Sometimes, the answer choices could all be wrong.