### 2.42.6 Multiplication of elements of each column of a matrix : `product`

`product` takes as argument a matrix *A*.

`product` returns the list whose elements are the product of the elements
of each column of the matrix *A* (see also 2.37.31 and
2.42.8).

Input :

`product([[1,2],[3,4]])`

Output :

`[3,8]`