# matrices array in latex [closed]

Hello everybody, I need a help to create this array.

\documentclass{article}
$\renewcommand\arraystretch{1.2} \begin{array}{|c|c|c|c|c|c|} \multicolumn{3}{c}{} & \multicolumn{3}{c}{B} \\ \cline{4-6} \multicolumn{3}{c|}{} & 2 & 1 & 4 \\ \cline{4-6} \multicolumn{3}{c|}{} & 5 & 0 & 1 \\ \cline{4-6} \multicolumn{3}{c|}{} & 2 & 3 & 2 \\ \hline 3 & 1 & 2 & 3\cdot2+1\cdot5+2\cdot2 & 3\cdot1+1\cdot0+2\cdot3 & 3\cdot4+1\cdot1+2\cdot2\\ \hline 1 & 4 & 3 & & & \\ \hline 2 & 3 & 5 & & & \\ \hline \multicolumn{3}{c}{A} & \multicolumn{3}{c}{AB} \\ \end{array}$