conversations.from: human
conversations.value: Solve the math problem: Wendy's truck has a gas tank that can hold 20 gallons. She also has a car with a gas tank that holds 12 gallons. The truck's tank is half full. The car's tank is 1/3 full. If she fills them both up completely, how many gallons does she add?
conversations.from: assistant
conversations.value: The truck tank has 10 gallons in it because 20 x .5 = 10
  The car tank has 4 gallons in it because 12 x (1/3) = 4
  She needs to add 10 gallons to the truck because 20 - 10 = 10
  She needs to add 8 gallons to the car because 12 - 4 = 8
  She needs to add 18 gallons in total because 10 + 8 = 18