The TV factory needs to produce 1,700 color TV sets. It has been produced for 4 days, 200 sets are produced every day, and the rest will be completed in 3 days. How many sets are produced per day on average?
电视厂要生产1700台彩电，已经生产了4天，每天生产200台，剩下的要3天完成，平均每天生产多少台？
<gadget id="calculator">4 * 200</gadget>
<output>800</output>

<gadget id="calculator">1_700 - 800</gadget>
<output>900</output>

<gadget id="calculator">900 / 3</gadget>
<output>300</output>

<result>300</result>