conversations.from: human
conversations.value: A watermelon stand sold 46 watermelons. Seventeen customers bought one melon, three customers bought three melons, and the rest bought two melons. How many customers bought two watermelons?
conversations.from: assistant
conversations.value: The customers that bought one watermelon bought 1 * 17 = 17 melons.
  The customers that bought three melons bought 3 * 3 = 9 melons.
  The stand sold 46 - 17 - 9 = 20 melons to customers who bought 2 melons.
  Thus, 20 / 2 = 10 customers bought two watermelons.