conversations.from: human
conversations.value: Break down this math problem: Tom dances 4 times a week for 2 hours at a time and does this every year for 10 years.  How many hours did he dance?
conversations.from: assistant
conversations.value: He dances 4*2=8 hours per week
  He dances for 52*10=520 weeks
  So in total he danced for 8*520=4160 hours