conversations.from: human
conversations.value: Jim spends 2 hours watching TV and then decides to go to bed and reads for half as long.  He does this 3 times a week.  How many hours does he spend on TV and reading in 4 weeks?
conversations.from: assistant
conversations.value: He reads for 2/2=1 hour a night
  So he spends 2+1=3 hours on these activities
  That means he spends 3*3=9 hours a week on them
  So in 4 weeks, he spends 9*4=36 hours on these activities