conversations.from: human
conversations.value: Terry drives at a speed of 40 miles per hour. He drives daily forth and back from his home to his workplace which is 60 miles away from his home. How many hours does Terry spend driving from home to the workplace and then back?
  Can you solve this problem?
conversations.from: assistant
conversations.value: The miles that Terry drives daily from home and back are 60 * 2 = 120 miles.
  The hours he takes driving from home and back are 120 / 40 = 3 hours.