help :I don't know the mult_matrix

[jinsong8412]

original Code from util
def mult_matrix((a1, b1, c1, d1, e1, f1), (a0, b0, c0, d0, e0, f0)):
"""Returns the multiplication of two matrices."""
return (a0a1+c0b1, b0a1+d0b1,
a0c1+c0d1, b0c1+d0d1,
a0e1+c0f1+e0, b0e1+d0f1+f0)
Always I know the matrix like this matrix([[ 0., 0., 0.],[ 0., 0., 0.],[ 0., 0., 0.]]) 33 matrix
I don't know the matrix (a1, b1, c1, d1, e1, f1) is 16 matrix ? who can help me ? Thanks