conversations.from: human
conversations.value: Crista's plants need to be watered every day. She has 20 plants. 4 of her plants need half of a cup of water. 8 plants need 1 cup of water. The rest need a quarter of a cup of water. How many cups of water does Crista need every day for her plants?
conversations.from: assistant
conversations.value: She will need 2 cups for the plants that need half of a cup of water because .5*4 = 2 cups
  She will need 8 cups for the plants that need a cup of water because 1*8= 8 cups.
  Since she has 20 plants, 20-4-8=8 plants that need a quarter of a cup of water.
  Since 8 plants need a quarter of a cup of water, she will need 2 cups of water for these plants because .25*8=2 cups.
  In total, she will need 2+8+2=12 cups of water per day.