Multiplication of two matrices: * &*

The infixed operator * and &* are used for the multiplication of two matrices.

Example.
Input:

[[1,2],[3,4]] * [[5,6],[7,8]]

or:

[[1,2],[3,4]] &* [[5,6],[7,8]]

Output:

⎡
⎢
⎣

19	22
43	50

⎤
⎥
⎦