conversations.from: human
conversations.value: Find the answer to the math problem: James takes up dancing for fitness.  He loses twice as many calories per hour as he did when he was walking.  He dances twice a day for .5 hours each time and he does this 4 times a week.  He burned 300 calories an hour walking.  How many calories does he lose a week from dancing?
conversations.from: assistant
conversations.value: He burns 2*300=600 calories an hour
  He dances for .5*2=1 hour per day
  So he burns 600*1=600 calories per day
  So he burns 600*4=2400 calories per week