conversations.from: human
conversations.value: Kara mixes cups of sugar and water in the ratio of 1:2 to make one liter of lemonade. Calculate the total number of cups of sugar used if she used 84 cups to make lemonade.
  What is the solution?
conversations.from: assistant
conversations.value: The total ratio for the cups of sugar and water needed to make lemonade is 1+2 = 3
  In the 3 cups needed to make one liter of lemonade, the fraction representing the cups of sugar needed is 1/3.
  If she used 84 cups while making lemonade, she used 1/3*84 = 28 cups of sugar.