conversations.from: human
conversations.value: This math problem has got me stumped: Running for 2 hours, Jonah burnt 30 calories every hour. How many more calories would he have lost if he would have run for five hours?
  Can you show me the way?
conversations.from: assistant
conversations.value: When Jonah ran for 2 hours, burning 30 calories every hour, he burnt a total of 2*30=60 calories.
  If he had run for five hours, losing 30 calories every hour, Jonah would have burnt 5*30=150 calories.
  The difference in the number of calories Jonah would have burnt if he ran for five hours instead of 2 hours is 150-60=90 calories.