conversations.from: human
conversations.value: Jeannie hikes the 12 miles to Mount Overlook at a pace of 4 miles per hour, and then returns at a pace of 6 miles per hour. How long did her hike take, in hours?
conversations.from: assistant
conversations.value: Up, took 12/4=3 hours.
  Down, took 12/6=2 hours.
  Total time was 3+2=5 hours.