road repair team built a road. On the first day, 10% of the total length was repaired, and on the second day, 15% of the total length was repaired. The second day was 20 meters longer than the first day. How many meters is this road?
某修路队修一条公路，第一天修了全长的10%，第二天修了全长的15%，第二天比第一天多修了20米，这条路有多少米？
<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">(3/20) - (1/10)</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">20 / (1/20)</gadget>
<output>400</output>

<result>400</result>