Matrices & Systems · Medium problem

Let $A = \begin{pmatrix}-3 & 0 & 2 \\ 0 & 4 & 2\end{pmatrix}$ and $B = \begin{pmatrix}0 & -2 \\ 1 & 2 \\ -3 & -2\end{pmatrix}$. Find the entry in row $1$, column $1$ of $AB$.