[[1 0 1][1 1 0]]
[[3 0 0 3][2 2 1 3][1 3 1 1]]
[[4. 3. 1. 4.][5. 2. 1. 6.]]

   乘以  

=

c11= a11*b11 + a12*b21 + a13*b31 == 1*3 + 0*2 +1*1 = 4

c12= a11*b12+ a12*b22+ a13*b32 == 1*0 + 0*2 + 1*3= 3

c13=a11*b13+ a12*b23+a13*b33

c14=a11*b14+ a12*b24+a13*b34

c21=a21*b11 + a22*b21 + a23*b31

c22= a21*b12+ a22*b22+ a23*b32

c23=a21*b13+ a22*b23+a23*b33

c24=a21*b14+ a22*b24+a23*b34

So:

C=

[[4. 3. 1. 4.][5. 2. 1. 6.]]