The Paper Tree Store wants a program that calculates and displays the number of single rolls of wallpaper needed to cover a room. The sales clerk will provide the room's length, width, and ceiling height, in feet. He or she also will provide the number of square feet a single roll will cover. If you were required to write a computer program to determine the number of single rolls of wallpaper needed to cover a room, what inputs, outputs, and algorithm would you use?