conversations.from: human
conversations.value: Antonov bought 60 candies. He gave a pack of candy to his sister. If a pack of candy has 20 pieces, how many packs does Antonov still have?
conversations.from: assistant
conversations.value: Antonov was left with 60 - 20 = 40 pieces of candy.
  Therefore, he still has 40 / 20 = 2 packs of candy.