conversations.from: human
conversations.value: Provide a step by step solution for the following math problem: Tim's car goes down in value by $1000 a year.  He bought it for $20,000. How much is it worth after 6 years?
conversations.from: assistant
conversations.value: It went down in value 1000*6=$6000
  So the car is worth 20000-6000=$14,000