conversations.from: human
conversations.value: Six bottles of 2 liters of water cost $12. What is the price of 1 liter of water?
  Give me a detailed solution.
conversations.from: assistant
conversations.value: Each bottle of 2 liters of water costs $12/6 = $2.
  So the cost of 1 liter of water is $2/2 = $1.