It takes 21 days for the road repair team to build a road. In the first 11 days, 400 meters were repaired, and the remaining 35 meters were completed every day. How long is this road?
修路队修一条路要21天，前11天修了400米，剩下的每天修35米正好修完，这条路长多少米？
<gadget id="calculator">21 - 11</gadget>
<output>10</output>

<gadget id="calculator">10 * 35</gadget>
<output>350</output>

<gadget id="calculator">400 + 350</gadget>
<output>750</output>

<result>750</result>