To build a road, the full length (1/5) was repaired on the first day, and the full length (2/7) was repaired on the second day. There is still 180 meters to be repaired. How long is this road in meters?
修一条公路，第一天修了全长的(1/5)，第二天修了全长的(2/7)，还有180米没修，这条公路长多少米？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">1 - (1/5) - (2/7)</gadget>
<output>18/35 = around 0.514286</output>

<gadget id="calculator">180 / (18/35)</gadget>
<output>350</output>

<result>350</result>