If A=(1234)A = \begin{pmatrix} 1 & 2 \\ 3 & 4 \end{pmatrix}A=(1324) and kkk is a scalar such that kA=(36912)kA = \begin{pmatrix} 3 & 6 \\ 9 & 12 \end{pmatrix}kA=(39612), what is the value of kkk?
k=1k = 1k=1
k=2k = 2k=2
k=3k = 3k=3
k=9k = 9k=9