Answer
$\begin{bmatrix} 19 & 22 & 2 \\ 43 & 50 & 4 \end{bmatrix}$
Work Step by Step
Use for rules of matrix multiplications, we have
$AB=\begin{bmatrix} 1 & 2\\ 3 & 4 \end{bmatrix}\times
\begin{bmatrix} 5 & 6 & 0 \\ 7 & 8 & 1 \end{bmatrix}=
\begin{bmatrix} 19 & 22 & 2 \\ 43 & 50 & 4 \end{bmatrix}$