conversations.from: human
conversations.value: It is approximately 1955 kilometers from San Diego, California to New York City, New York. If Bernice drove 325 kilometers for 4 days, how many kilometers will she still need to drive?
  Can you solve this problem?
conversations.from: assistant
conversations.value: 325 * 4 = 1300 km
  1955 - 1300 = 655 km
  Bernice will still have 655 kilometers to travel.