code: def mult_matrix(m1, m0):
      (a1, b1, c1, d1, e1, f1) = m1
      (a0, b0, c0, d0, e0, f0) = m0
      
      return (a0*a1+c0*b1,    b0*a1+d0*b1,
              a0*c1+c0*d1,    b0*c1+d0*d1,
              a0*e1+c0*f1+e0, b0*e1+d0*f1+f0)
docs: Returns the multiplication of two matrices.