conversations.from: human
conversations.value: Solve the following math problem: Joe's pizzeria has an amazing promotion. If you buy any regular large pizza you can get the next 3 medium pizzas for $5 each. What are your total savings if the regular medium pizza price is $18 and you take full advantage of the promotion?
conversations.from: assistant
conversations.value: If one medium pizza costs $18 and with the promotion I can buy one for $5, then I'm saving $18-$5 = $13 on each medium pizza
  If I take full advantage of the promotion, that means I bought all 3 medium pizzas, therefore I saved a total of 3*$13 = $39 in total