multiplication of rows by range in a matrix

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i have two matrices
matrix A:
50 44 80 0
50 0 80 52
50 0 80 52
49 49 2 2
matrix B:
5 4 9 7
10 3 10 6
If 1,2,3,4 or 5 is written in matrix b, multiply the last row in matrix A with the first row.
If matrix b says 6 or 7, multiply the last row in matrix A with the second row.
If 8 is written in matrix b, multiply the last row in matrix A with the third row.
However, let him continue this by examining both columns separately. It should return for each row of matrix B.And display them in a new matrix
For example the new matrix:
2450 2156 160 104
2450 132 160 104
Is such a code possible?
Thank u for help
  3 Comments
Torsten
Torsten on 22 Mar 2022
It's possible, but you stated the rules differently.

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