A toy workshop needs to produce 876 "Transformers" toys. It has been done for 12 days, with an average of 45 per day. How many are left unfinished?
一个玩具车间要生产876只"变形金刚"玩具，已经做了12天，平均每天做45只，还剩下多少只没有完成？
<gadget id="calculator">45 * 12</gadget>
<output>540</output>

<gadget id="calculator">867 - 540</gadget>
<output>327</output>

<result>327</result>