The engineering team built a road. On the first day, it built a total length of 500 meters. On the second day, it repaired the remaining 40% and left 480 meters unrepaired. How long is this road in meters?
工程队修一条公路，第一天修了全长的500米，第二天修了余下的40%，还剩下480米没有修，这条公路长多少米．
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">500 * (2/5)</gadget>
<output>200</output>

<gadget id="calculator">480 - 200</gadget>
<output>280</output>

<gadget id="calculator">500 + 280</gadget>
<output>780</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">780 / (3/5)</gadget>
<output>1_300</output>

<result>1_300</result>