Multiply $18$ by $-7$.

Multiply $29$ by $-11$.

Multiply $-18$ by $13$.

Multiply $-56$ by $16$.

Multiply $32$ by $-21$.

Multiply $-57$ by $0$.

Multiply $0$ by $-31$.

Multiply $-12$ by $-9$.

Multiply $-746$ by $-8$.