Answer :
if what's required to make 8 desks is 48 screws, that means for every desk he needs 6 screws (48/8=6).
and if he asks how much will be needed for 32 desks then the answer is 6*32 = 192 screws.
and if he asks how much will be needed for 32 desks then the answer is 6*32 = 192 screws.