Hello everybody.
Thank you again to Bert and Arun for their help on my previous question.
I know have the following problem:
I have a matrix :
A =
1  2  3
4  5  6
7  8  9
9  8  7
4  5  6
3  2  1

And I would like to have :
B =
1*4*7  2*5*8  3*6*9
4*7*9  5*8*8  6*9*7
7*9*4  8*8*5  9*7*6
9*4*3  8*5*2  7*6*1

Here I took the product of 3 rows each time. And 3 needs to be a parameter.

Is it possible to do so without any loop ?

Thank you in advance !

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