conversations.from: human
conversations.value: Please show me the solution for: James has a rainwater collection barrel.  For each inch of rain he collects 15 gallons.  On Monday it rained 4 inches and on Tuesday it rained 3 inches.  He can sell water for $1.2 per gallon.  How much money did he make from selling all the water?
conversations.from: assistant
conversations.value: It rained 3+4=7 inches
  So he collected 7*15=105 gallons
  So he makes 105*1.2=$126 from selling the water