The agricultural machinery factory produces 8,700 threshing machines. It has been in production for 12 days, 500 units are produced every day, and the remaining 3 days are completed. How many units are produced per day on average?
农机厂生产8700台脱粒机，已经生产了12天，每天生产500台，剩下的3天完成，平均每天生产多少台？
<gadget id="calculator">500 * 12</gadget>
<output>6_000</output>

<gadget id="calculator">8_700 - 6_000</gadget>
<output>2_700</output>

<gadget id="calculator">2_700 / 3</gadget>
<output>900</output>

<result>900</result>