# Built-in
A := [[1, 2], [3, 4], [5, 6], [7, 8]];
B := [[1, 2, 3], [4, 5, 6]];

PrintArray(A);
#  [ [  1,  2 ],
#    [  3,  4 ],
#    [  5,  6 ],
#    [  7,  8 ] ]

PrintArray(B);
#  [ [  1,  2,  3 ],
#    [  4,  5,  6 ] ]

PrintArray(A * B);
#  [ [   9,  12,  15 ],
#    [  19,  26,  33 ],
#    [  29,  40,  51 ],
#    [  39,  54,  69 ] ]