conversations.from: human
conversations.value: Provide a step by step solution for the following math problem: In India, it cost $1 to purify a gallon of fresh water. Each person needs 1/2 a gallon of fresh water a day. In a family of 6, how much will it cost for fresh water for the day?
conversations.from: assistant
conversations.value: The family needs 3 gallons of water because 6 x .5 = 3
  It will cost $3 because 3 x 1 = 3