conversations.from: human
conversations.value: Solve the following math problem: John takes 3 naps a week.  Each nap is 2 hours long.  In 70 days how many hours of naps does he take?
conversations.from: assistant
conversations.value: There are 70/7=10 weeks in 70 days.
  So he takes 10*3=30 naps
  That means he naps for 30*2=60 hours