To build a road, the road that has been repaired is 1/3 of the road that has not been repaired. If another 35 meters are repaired, 30% of this road can be completed. How long is this road in meters?
修一段公路，已修的公路是未修公路的(1/3)，如果再修35米，就可以完成这段公路的30%，这段公路长多少米？
<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 + 3</gadget>
<output>4</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(3/10) - (1/4)</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">35 / (1/20)</gadget>
<output>700</output>

<result>700</result>