conversations.from: human
conversations.value: A farmer has 51 cows. The farmer adds five new cows to its herd and then sells a quarter of the herd. How many cows does the farmer have left?
conversations.from: assistant
conversations.value: The farmer has 51+5 = 56 cows in its herd.
  The farmer sells 56/4 = 14 cows of the herd.
  The farmer now has 56-14 = 42 cows.