Evaluate the following matrix product.

$\left[\begin{array}{cc} -3 &1\cr -3 &3 \end{array}\right] \left[\begin{array}{c} 9\cr 1 \end{array}\right] =$ $\left[\Rule{0pt}{2.4em}{0pt}\right.$$\left]\Rule{0pt}{2.4em}{0pt}\right.$