John takes 3 naps a week.  Each nap is 2 hours long.  In 70 days how many hours of naps does he take?
There are 70/7=<T>divide(70, 7)=10.0 weeks in 70 days.
So he takes 10*3=<T>multiply(10, 3)=30 naps
That means he naps for 30*2=<T>multiply(30, 2)=60 hours
