Creating conditional calculations

I have a project (spreadsheet attached). Im going to be adding lots of data with a similar theme.

In cell X there will be a number for the width and in cell Y a number for the length. On the sample sheet cell X is 508 and Y is 1.

You will then see in cells F, H, I, S, AF, AG and BK it references the number 508 and 1. I want to create a formula or function whereby I can automatically input whatevers in cell X and Y.

My initial thought is to replace 508 in F, H, I, S, AF, AG and BK with PRODUCTWIDTH and 1 in 508 in F, H, I, S, AF, AG and BK with PRODUCTLENGTH. Then make a formula that will automaticlaly change the word PRODUCTWIDTH to whats in cell X and PRODUCTLENGTH to whats in cell Y.

Whats the best way to do this?