First, we need to know how many cups are in one peach pie.
We can do this by taking 10 divided by 2.
10 / 2 = 5
So, every peach, there are 5 cups in that pie.
We want to know how many cups of peach are going to be in 9 peach pies. Just multiply.
5 * 9 = 45
45 is your answer.