conversations.from: human
conversations.value: Dexter has five pigs. Each one eats 4 pounds of feed, twice a day. If Dexter ordered 300 pounds of feed, how many pounds of feed is left after a week?
  Give me a solution to this problem
conversations.from: assistant
conversations.value: In a day, one pig consumes 4 x 2 = 8 pounds of feed.
  In a day, five pigs consume 8 x 5 = 40 pounds.
  In a week, five pigs consume 40 x 7 = 280 pounds.
  So, there are 300 - 280 = 20 pounds of feed left.