conversations.from: human
conversations.value: Find the answer to the math problem: Every 2 years, the number of swans at Rita's pond doubles. Currently, there are 15 swans in the pond. How many swans will there be in ten years?
conversations.from: assistant
conversations.value: If currently there are 15 swans in the pond, in two years' time there will be 15*2=30 swans.
  In another two years, the number of swans in the pond will double to 2*30=60 swans
  In another two years, the number of swans in the pond will double to 2*60=120 swans
  If after 6 years there are 120 swans in the pond, in eight years times there will be 2*120=240 swans
  In another two years, which is 10 years, there will be 2*240=480 swans in the pond