The garment factory produces 4000 sets of clothes and has been producing 150 sets per day for 20 days. The rest will be completed in 5 days, how many sets are produced per day on average?
服装厂生产4000套衣服，已经生产了20天，每天生产150套．剩下的要在5天里完成，平均每天生产多少套？
<gadget id="calculator">150 * 20</gadget>
<output>3_000</output>

<gadget id="calculator">4_000 - 3_000</gadget>
<output>1_000</output>

<gadget id="calculator">1_000 / 5</gadget>
<output>200</output>

<result>200</result>