conversations.from: human
conversations.value: Two sisters, Elizabeth and Margareth, bought beads. Elizabeth bought 1 pack of red and 2 packs of clear beads, while Margareth bought 3 packs of blue and 4 packs of red beads. How many more beads do one sister have than the other, if each pack of beads contains 20 pieces of beads?
conversations.from: assistant
conversations.value: Elizabeth bought 1 + 2 = 3 packs.
  So Elizabeth bought 3 x 20 = 60 pieces of beads.
  Margareth bought 3 + 4 = 7 packs.
  So Margareth bought 7 x 20 = 140 pieces of beads.
  Therefore, Margareth bought 140 - 60 = 80 more beads than Elizabeth.