conversations.from: human
conversations.value: Big boxes contain 7 dolls each. Small boxes contain 4 dolls each. There are 5 big boxes and 9 small boxes. How many dolls are there in total?
  Can you solve this problem?
conversations.from: assistant
conversations.value: There are 7*5=35 dolls in the big boxes.
  There are 4*9=36 dolls in the small boxes.
  There are 35+36=71 dolls altogether.