Answer
$\begin{bmatrix}
1 & 3 & 0\\
0 & 0 & 1\\
0 & 0 & 0
\end{bmatrix}$
Work Step by Step
Using a Calculator:
$\begin{bmatrix}
1 & 3 & 2\\
5 & 15 & 9\\
2 & 6 & 10
\end{bmatrix}$ ~ $\begin{bmatrix}
1 & 3 & 0\\
0 & 0 & 1\\
0 & 0 & 0
\end{bmatrix}$