John scores 2 shots worth 2 points and 1 shot worth 3 points every 4 minutes.  He plays for 2 periods.  Each period is 12 minutes.  How many points does he score?
He played for 2*12=<T>multiply(2, 12)=24 minutes
He gets 2*2=<T>multiply(2, 2)=4 points per minute from the two-point shots
So he scores 4+3=<T>add(4, 3)=7 points per minute
There are 24/4=<T>divide(24, 4)=6.0 intervals
So he scores 7*6=<T>multiply(7, 6)=42 points
