A road was completed in two weeks, and 60% of its total length was repaired in the first week, which was 120 meters longer than in the second week. How long is this road in meters?
一条公路两周修完，第一周修了全长的60%，比第二周多修120米，这条公路全长多少米？
<gadget id="calculator">60 / 100</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">(3/5) - (2/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">120 / (1/5)</gadget>
<output>600</output>

<result>600</result>