conversations.from: human
conversations.value: The house is 20.5 feet by 10 feet. The porch measures 6 feet by 4.5 feet. The house and the porch need shingles. How many square feet of shingles will be needed to roof the house and the porch?
conversations.from: assistant
conversations.value: House = 20.5 * 10 = 205 square feet
  Porch = 6 * 4.5 = 27 square feet
  205 + 27 = 232 square feet
  232 square feet of shingles will be needed.