Describe a model that represents 3/3 x 4/4?

This should answer your question.

any number over itself is 1. so
3/3=1 and 4/4=1

so essentially the problem is, what is 1x1. 
1x1 is 1

3/3=1
4/4=1
1x1=1 
1
I really hope this helped! :)