Bob buys 50 feet of rope.  He uses a 5th of it to make a small piece of art.  He takes the rest and gives half of it to the friend.  After that, he cuts 2-foot sections.  How many sections does he get?
He cuts off 50/5=<T>divide(50, 5)=10.0 feet
So he has 50-10=<T>subtract(50, 10)=40 feet left
He gives half away which means he has 40/2=<T>divide(40, 2)=20.0 feet
So he has 20/2=<T>divide(20, 2)=10.0 sections
