100 inches is greater than or less than or equal to 3 yard and 1ft

Ok so first, I am going to make an equation like this one:
     100_ 3 yard and 1 ft
so I need to find out what goes into the blank so I know that there are 12 inches in 1 ft so my 1 ft is equal to 12 inches.
I also know that there are 3 ft in 1 yard so I am going to multiply 3 × 3 = 9 So know i know that there are 9 ft but now, I am going to add my 1 ft so there will be 10 ft in total. So I am now going to multiply 12 in × 10 ft    To get my answer and 12 in × 10 ft = 120 inches.

So now I am going to do this: 
      100 inches < 120 inches ( or 3 yards and 1 ft)