<human>:  Oprah has 3500 cars in her collection. If the average number of cars she gives away per year is 50, how many years will it take to reduce her car collection to 500?
<bot>: How many cars does Oprah want to give away? ** If Oprah wants to have 500 cars left, she will have to give away 3500-500 = <<3500-500=3000>>3000 cars.
How many years will it take to reduce her car collection to 500? ** Since the average number of cars she gives away per year is 50, it will take her 3000/50 = <<3000/50=60>>60 years to give away enough cars to have 500 left over.
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