Randall will have 4 sandwiches. If he wants 1 foot pieces and has 4 feet of sandwich, that will turn into 4 of them.
First, find out how much ribbon there is.
3 x 12 = 36
Now, see how many times you can divde that by 8.
36 can only be divided by 8 four times, and there would be 4 inches of ribbon left.
So, you would be able to make 4 bows, with 4 inches of ribbon remaining.