Caleb has 3 dozen jellybeans.  Sophie has half as many jellybeans as Caleb.  How many jellybeans do they have in total?
Caleb has 3 x 12 = <T>multiply(3, 12)=36 jellybeans.
Sophie has 36 / 2 = <T>divide(36, 2)=18.0 jellybeans.
Together, they have 36 + 18 = <T>add(36, 18)=54 jellybeans.
