conversations.from: human
conversations.value: Solve the math problem: A cook had 300 carrots in a bucket he was using to cook meals for a restaurant. Before lunch, he had used 2/5 of the carrots. By the end of the day, he had chopped and used 3/5 of the remaining carrots. How many carrots were not used that day?
conversations.from: assistant
conversations.value: Before lunch, the cook had used 2/5*300 = 120 carrots.
  The number of remaining carrots after the cook used 2/5 of them is 300-120 = 180.
  The cook had used 3/5*180 = 108 of the remaining carrots by the end of the day.
  The number of carrots that the cook did not use that day is 180-108 = 72.