conversations.from: human
conversations.value: Dexter and Jay are using a gallon of white paint to paint the walls. Dexter used 3/8 of the gallon of paint while Jay used 5/8 of a gallon of paint. If a gallon is equal to 4 liters, how many liters of paint were left from Dexter and Jay combined?
  How to solve this?
conversations.from: assistant
conversations.value: Dexter used 4 x 3/8 = 3/2 liters of paint.
  Jay used 4 x 5/8 = 5/2 liters of paint.
  Together, they used 3/2 + 5/2 = 4 liters of paint.
  Since each of them used a gallon of paint, then they both used 2 x 4 = 8 liters of paint together.
  Therefore, 8 - 4 = 4 liters of paint were left.