conversations.from: human
conversations.value: Tom paints a room that has 5 walls.  Each wall is 2 meters by 3 meters.  John can paint 1 square meter every 10 minutes.  He has 10 hours to paint everything.  How many hours does he have to spare?
  Give me a solution to this problem
conversations.from: assistant
conversations.value: Each wall is 2*3=6 square meters
  So each wall takes 6*10=60 minutes to paint
  So it takes 60/60=1 hour to paint each wall
  That means in total it takes 5*1=5 hours to paint
  So he has 10-5=5 hour left after finishing painting