conversations.from: human
conversations.value: I would love to understand how to solve this problem: John injured his back and needs to go to physical therapy.  He went to physical therapy for 6 weeks.  Each week he went twice for 2 hours at a time.  If the sessions cost $125 per hour how much did the physical therapy cost?
  Can you explain?
conversations.from: assistant
conversations.value: Each week he did 2*2=4 hours of physical therapy
  So it cost 4*125=$500 per week
  This means he spent 500*6=$3000