Answer
$3\times 6$
Work Step by Step
If A is an $\mathrm{m}\times\fbox{$\mathrm{p}$}$ matrix, and B is a $\fbox{$\mathrm{p}$}\times \mathrm{n}$ matrix,
the product AB is defined, and is an $\mathrm{m}\times \mathrm{n}$ matrix.
Here, A is $3\times\fbox{$2$}$, B is $\fbox{$2$}\times 6$,
so AB is $3\times 6$
