conversations.from: human
conversations.value: I'm stuck on this math problem: Winston had 10 gallons of gas in his car’s gas tank. He drives to the store and uses 6 gallons of gas. Then he drives to the doctor’s office and uses 2 gallons of gas. If the tank can hold up to 12 gallons of gas, how many gallons of gas will Winston need to refill the entire tank?
  Can you help?
conversations.from: assistant
conversations.value: After driving to the store and doctor’s office, Winston has 10 - 6 - 2 = 2 gallons of gas left in the tank
  To refill the entire tank, Winston needs 12 - 2 = 10 gallons of gas