Given the following reasoning and answer, what was the question? Since the building has four floors with ten rooms each, the total number of rooms in the building is 4 * 10 = 40. If it takes Legacy 6 hours to clean each room, she will take 40 * 6 = 240 hours to clean all the rooms in the building. Since she is making $15 per hour of work, she will earn $15 * 240 = $3600 after cleaning all the rooms.
 The answer: 3600
The question A building has four floors with ten rooms each. Legacy has to clean each room, and it takes her 6 hours to clean one room. If she earns $15 per hour of work, calculate the total amount of money she makes from cleaning all the floors in the building.