????

The answer is 15 3/4 or 63/4

 

Explaination:

4 1/2 x 5 1/4 x 2/3 =

9/2 x 21/4 x 2/3 =

378/24 

then simplify by dividing by 6, which gives you 

63/4 or you can turn it into a mixed number

15 3/4

 

 There you go, i hope i explained properly.