Product of Matrices

A = [[3, 7, 3],
    [4, 8, 1],
    [2, 7, 5]]
B = [[2, 8, 1, 2],
    [7, 9, 2, 0],
    [3, 6, 7, 1]]
result = [[0, 0, 0, 0],
        [0, 0, 0, 0],
        [0, 0, 0, 0]]
# iterating by row of A
for i in range(len(A)):
    # iterating by column by B
    for j in range(len(B[0])):
        # iterating by rows of B
        for k in range(len(B)):
            result[i][j] += A[i][k] * B[k][j]
for r in result:
    print(r)