You can
put this solution on YOUR website!Draw a diagram of a 12 by 3 rectangle with the 12 foot side the length left to right..
Starting @ the upper right corner measure 3 feet to the left & cut the rug 1 foot down. Now cut 3 feet to the left & then 1 foot down another 3 feet to the left & down the final foot.
Now move the left piece up one foot & 3 feet to the right.
You now have a 9 by 4 rug.
Using graph paper it looks simple to do.