Hamsters, i tried to times it by 2 but its 10 and the answers are not close, i think ive done something wrong, maybe i times it 3 times? 15? or do i just choose 5?

Hamsters i tried to times it by 2 but its 10 and the answers are not close i think ive done something wrong maybe i times it 3 times 15 or do i just choose 5 class=