Matrices & Systems · Medium problem

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