To build a road, the whole road (1/5) was built on the first day, and the rest (1/4) was built on the second day. The total length of the road was 135 meters in two days. How many meters is the total length of this road?
修一条路，第一天修了全路的(1/5)，第二天修了余下的(1/4)，两天共修路135米，这条路全长多少米？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

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

<gadget id="calculator">(4/5) * (1/4)</gadget>
<output>1/5 = around 0.2</output>

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

<gadget id="calculator">135 / (2/5)</gadget>
<output>675/2 = around 337.5</output>

<result>675/2 = around 337.5</result>