Maths, maths and more maths, I guess

Today in math, we were given something very simple to do. The problem started off like this.

Sonny gets given twice as much as Sam.
Sylvia gets triple what Sam gets.




The kids receive a certain amount of candy each per day. On Tuesday and Wednesday, Sylvia gets eighteen pieces of candy. How many candies should Sonny get for five days?
Because of the information we got about Sylvia, we can say, if she gets eighteen in two days, then it must nine for one day. From there we figured out that Sam gets three pieces per day and Sonny gets six. Using simple multiplication, that being six times five, we figured out that Sonny will get thirty pieces in five days.
There was also a second part. If Sam wants to get thirty-nine pieces by Saturday, how many more pieces would he have to get? So, from here we went he would get fifteen for the first five days of the week and need another twenty-four to get thirty-nine pieces by Saturday.