conversations.from: human
conversations.value: Please show me the solution for: Bernie loves eating chocolate. He buys two chocolates every week at the local store. One chocolate costs him $3. In a different store, there is a long-term promotion, during which each chocolate costs only $2. How much would Bernie save in three weeks, if he would buy his chocolates in this store instead of his local one?
conversations.from: assistant
conversations.value: During three weeks, Bernie buys 3 * 2 = 6 chocolates.
  In the local store, he pays for them 6 * 3 = $18.
  If Bernie would buy the same chocolates in the different store, he would pay 6 * 2 = $12.
  So Bernie would be able to save 18 - 12 = $6.