The road construction team has to build a 2500-meter-long road for 3 days first, and 300 meters every day. The remaining 400 meters will be repaired every day, how many days will it take to complete the repair?
修路队要修一段2500米长的路，先修3天，每天修300米．剩下的每天修400米，还要几天修完？
<gadget id="calculator">300 * 3</gadget>
<output>900</output>

<gadget id="calculator">2_500 - 900</gadget>
<output>1_600</output>

<gadget id="calculator">1_600 / 400</gadget>
<output>4</output>

<result>4</result>