mmul = lambda m1, m2: [[sum(aij*bjk for aij, bjk in zip(ai, bk))
                        for bk in zip(*m2)] for ai in m1]

a = [[1,2,3],[2,3,4],[1,1,1]]
b = [[4,5,6],[7,8,9],[4,5,7]]

for row in mmul(a, b):
    for i in row: print(i)