conversations.from: human
conversations.value: I'm stuck on this math problem: There are 21 cherry tomatoes on the tomato plant.  2 birds eat one-third of the tomatoes.  How many are still left on the tomato plant?
  Can you help?
conversations.from: assistant
conversations.value: The birds eat this many tomatoes: 21 / 3 = 7 tomatoes.
  There are this many tomatoes left on the plant: 21 - 7 = 14 tomatoes.