A seamstress needs to cut 15-inch pieces of ribbon from a roll of ribbon that is 9 feet in length. What is the greatest number of 15-invh pieces the seamstress can cut from 5 of these rolls of ribbon? Show your work. Please put the right answer. Thx

each roll is 9 ft....so 5 rolls = (9 * 5) = 45 ft
1 ft = 12 inches....so 45 ft = (12 * 45) = 540 inches

540/15 = 36 <=== she can cut 36 fifteen inch pieces of ribbon