conversations.from: human
conversations.value: Please show me the solution for: It takes 20 minutes for John to go to the bathroom 8 times.  How long would it take to go 6 times?
conversations.from: assistant
conversations.value: He spends 20/8=2.5 minutes each time he goes in
  So it would take 2.5*6=15 minutes to go 6 times