To build a road, the full length (3/5) was repaired on the first day, and the rest (5/8) was repaired on the second day, leaving 120 meters left. How long is this road in meters?
修一条公路，第一天修了全长的(3/5)，第二天修了余下的(5/8)，还剩下120米，这条公路全长多少米？
<gadget id="calculator">3 / 5</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">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">(2/5) * (5/8)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (3/5) - (1/4)</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">120 / (3/20)</gadget>
<output>800</output>

<result>800</result>