conversations.from: human
conversations.value: Can you guide me through solving this problem: A phone factory makes twice as many phones as last year. Last year’s production was 5000 phones. If a quarter of this year’s production is sold, how many phones are left in the factory?
conversations.from: assistant
conversations.value: This year’s total production is 5000 * 2 = 10000 phones.
  A quarter of this year’s production is 10000 / 4 = 2500 phones.
  The number of phones left after selling a quarter of the production is 10000 – 2500 = 7500 phones.