Raul placed 32 stamps in his collection book. he placed the stamps in 2 rows of 16 stamps each. which shows a different way raul can place all of the stamps?

One correct answer would be 4 rows of 8 stamps each.

It sounds like you're doing arrays.  If you weren't given any options to choose from and you have to create this yourself, then you can use the answer I helped you with. 
With arrays there are different examples you can create.  The only rule you have to follow is that you have everything shared equally with each row, meaning each row of what you choose can have no more and no less than any other row. 
Ex:  (given above) 2 rows of 16
4 rows of 8
8 rows of 4
16 rows of 2