To build a road, the entire length (1/5) of the road was repaired in the first month, and 25% of the entire length was repaired in the second month. At this time, there is still 2.5 kilometers away from the midpoint of the road. What is the total length of this road? rice?
修一条公路，第一个月修了全程的(1/5)，第二个月又修了全程的25%，这时距离这条路的中点还有2.5千米，这条公路全长多少千米？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

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

<gadget id="calculator">(1/2) - (1/5) - (1/4)</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">2.5 / (1/20)</gadget>
<output>50</output>

<result>50</result>