A certain engineering team repaired a road. On the first day, it repaired the full length (2/5). On the second day, it repaired 20 meters more than the first day. At this time, there were still 420 meters left to be repaired. How long is this road in meters?
某工程队修一条路，第一天修了全长的(2/5)，第二天修的比第一天多20米，这时还剩下420米没有修．这条公路全长多少米？
<gadget id="calculator">420 + 20</gadget>
<output>440</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(2/5) * 2</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 - (4/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">440 / (1/5)</gadget>
<output>2_200</output>

<result>2_200</result>