Matrices & Systems · Medium problem

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