Multiply matrices

$\text E = \left[\begin{array}{rr}-1 & 4 \\ 5 & 2\end{array}\right]$ and $\text C = \left[\begin{array}{rr}1 & 2 \\ -1 & 1\end{array}\right]$. ** Let $\text {H = EC}$. Find $\text H$. ** [[☃ matrix 2]]