def test():
m = Matrix.new(4, 5)
m[1] += Vector.E(5)
m[1] *= 3
print(m)
m = Matrix.rand(4, 5)
k = Matrix.rand(5, 6)
print(m * k)
def test():
m = Matrix.new(4, 5)
m[1] += Vector.E(5)
m[1] *= 3
print(m)
m = Matrix.rand(4, 5)
k = Matrix.rand(5, 6)
print(m * k)
