conversations.from: human
conversations.value: Break down this math problem: John gets lost on his way home.  His normal trip is 150 miles and would take him 3 hours.  He ends up driving 50 miles out of the way and has to get back on track.  How long did the trip take if he kept the same speed?
conversations.from: assistant
conversations.value: His speed is 150/3=50 mph
  He was detoured 50*2=100 miles
  So that adds 100/50=2 hours
  So the total trip was 3+2=5 hours