conversations.from: human
conversations.value: John takes a 10-minute shower every other day for 4 weeks. If his shower uses 2 gallons of water per minute.  How much water does he use in those 4 weeks?
  Work out the solution step by step.
conversations.from: assistant
conversations.value: There are 4*7=28 days in those 4 weeks
  That means he takes 28/2=14 showers
  So he takes a total of 14*10=140 minutes of showers
  So he uses 2*140=280 gallons of water