To build a road, the whole road (2/5) was built on the first day, and the rest (1/2) was repaired on the second day, leaving 120 meters unrepaired. How many meters is this road in total?
修一条路，第一天修了全路的(2/5)，第二天修剩下的(1/2)，还剩下120米没修，这条路共多少米？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(3/5) * (1/2)</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 - (2/5) - (3/10)</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">120 / (3/10)</gadget>
<output>400</output>

<result>400</result>