Area is 756 length is 108 what is width

I give you hints
Length x Width = Area (in this case)
Substitute numbers and you will get the answer for width.

Well before we answer this question we need to remember 1 rule. 
Length x width = area
But they only give us area and length. 
Soo.. In this case we would divide the length by the area. 

See? 
756 ÷ 108 = 7

So our answer is...
Width = 7 

Good Luck! :)