conversations.from: human
conversations.value: I need help with this problem:
  A crayon factory makes 4 colors of crayons. They put 2 of each color crayon in each box. The factory produces enough crayons to fill 5 boxes per hour. How many crayons does the factory produce in 4 hours?
conversations.from: assistant
conversations.value: Each box contains 4*2=8 crayons.
  In an hour, they make 8*5=40 crayons.
  In 4 hours they make 4*40=160 crayons.