\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)
Calculate the product of the vector \(\vec{a} = \begin{pmatrix} 2 \\ -3 \end{pmatrix}\) by \(-4\).
\(-4\vec{a} =\begin{pmatrix} \input{124574}{}{3em}{2em}{}{}\\ \input{224574}{}{3em}{2em}{}{}\\ \end{pmatrix} \)