Troy makes soup.  He buys 4 pounds of beef and 6 pounds of vegetables.  The vegetables cost $2 per pound and the beef is 3 times that price.  How much does everything cost?
The vegetables cost 2*6=$<T>multiply(2, 6)=12
The beef cost 2*3=$<T>multiply(2, 3)=6 per pound
So the beef cost 4*6=$<T>multiply(4, 6)=24
So the total cost is 12+24=$<T>add(12, 24)=36
