To build a road, the full length (1/4) was built for the first time, and 15% of the total length was repaired for the second time. At this time, there are still 8 kilometers away from the midpoint. How many kilometers is the total length of this road?
修一条公路，第一次修了全长的(1/4)，第二次修了全长的15%，这时离中点还有8千米，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 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">(1/2) - (1/4) - (3/20)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">8 / (1/10)</gadget>
<output>80</output>

<result>80</result>