Farmer Brown fed 7 chickens and 5 sheep. How many total legs were there among the animals he fed?
The chickens had 7*2=<T>multiply(7, 2)=14 legs.
The sheep had 5*4=<T>multiply(5, 4)=20 legs.
There were 14+20=<T>add(14, 20)=34 legs.
