conversations.from: human
conversations.value: Find the answer to this math problem: Joy can read 8 pages of a book in 20 minutes. How many hours will it take her to read 120 pages?
conversations.from: assistant
conversations.value: In one hour, there are 3 sets of 20 minutes.
  So, Joy can read 8 x 3 = 24 pages in an hour.
  It will take her 120/24 = 5 hours to read 120 pages.