Note that 6 inches is half a foot, so if its 4ft. then 1/2 of a foot goes in 8 times which means that the scale factor is 8. :)
You can add a decimal point at the end of number then zero. Example....
2.40
______
5| 12.00
-10
________
20
-20
_______
0
2.4
This was done from using the method of synthetic division. I attached the image. Hope this helps