Big boxes contain 7 dolls each. Small boxes contain 4 dolls each. There are 5 big boxes and 9 small boxes. How many dolls are there in total?
There are 7*5=<T>multiply(7, 5)=35 dolls in the big boxes.
There are 4*9=<T>multiply(4, 9)=36 dolls in the small boxes.
There are 35+36=<T>add(35, 36)=71 dolls altogether.
