conversations.from: human
conversations.value: Barbi lost 1.5 kilograms each month for a year. Luca lost 9 kilograms every year for 11 years. How many more kilograms did Luca lose than Barbi?
conversations.from: assistant
conversations.value: Barbi = 1.5 * 12 months = 18 kg
  Luca = 9 * 11 = 99 kg
  99 - 18 = 81 kg
  Luca lost 81 kg more than Barbi.