Tom uses 10 weight plates each weighing 30 pounds on an exercise machine.  This exercise machine uses special technology to make the weights 20% heavier on the lowering portion.  How heavy did the weights feel when being lowered?
The weight stack weighed 10*30=<T>multiply(10, 30)=300 pounds
So the added weight made it 300*.2=<T>multiply(300, 0.2)=60.0 pounds heavier
So when he lowered the weight it was 300+60=<T>add(300, 60)=360 pounds
