conversations.from: human
conversations.value: I'm stuck on this math problem: A fixer uses 30% of the nails in a container to repair the kitchen. He also used 70% of the remaining nails in the container to repair the fence. If there were 400 nails in the container, how many nails are remaining?
  Can you help?
conversations.from: assistant
conversations.value: The fixer used 30/100*400 = 120 nails to fix the kitchen.
  The number of nails remaining in the container after he fixes the kitchen is 400-120 = 280
  He also uses 70/100*280 = 196 of the nails remaining in the container to fix the fence.
  The total number of nails which the fixer hasn't used is 280-196 = 84