Jake decides to go to the beach for a fun day.  It is a 2-hour drive each way.  He then spends 2.5 times at long at the beach as his total driving time.  How much time does the trip take?
He drives for a total of 2*2=<T>multiply(2, 2)=4 hours
So he spends 4*2.5 =<T>multiply(4, 2.5)=10.0 hours at the beach
That means the total trip took 10+4=<T>add(10, 4)=14 hours
