made it extremely easy for you.
You're cutting something into pieces, so you're dividing one into the other:
9 ÷ 2/3
What happens when you divide by a fraction? You flip it and multiply:
9 * 3/2 = 27/2
Change the above improper fraction into a mixed number, and you'll have your answer. The whole number will be the number of pieces, and the fraction will be how much of an inch is left over.