To build a canal, 35% of the total length was built on the first day, 120 meters on the second day, and 25% of the total length on the third day, leaving just 60 meters left to be repaired. How long is this road in meters?
修一条水渠，第一天修了全长的35%，第二天修了120米，第三天修了全长的25%，刚好还剩60米没有修．这条路全长多少米？
<gadget id="calculator">120 + 60</gadget>
<output>180</output>

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

<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(7/20) + (1/4)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">180 / (2/5)</gadget>
<output>450</output>

<result>450</result>