Workers repair a road. On the first day, they repaired 20% of the total length, and on the second day, they repaired 63 meters, leaving 35% of the total length. Find the total length?
工人修一条公路，第一天修了全长20%，第二天修了63米，还剩下全长的35%，求全长？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">35 / 100</gadget>
<output>7/20 = around 0.35</output>

<gadget id="calculator">1 - (1/5) - (7/20)</gadget>
<output>9/20 = around 0.45</output>

<gadget id="calculator">63 / (9/20)</gadget>
<output>140</output>

<result>140</result>