To build a road, the full length (1/4) was built on the first day, and 50% of the total length was repaired on the second day. There are still 3.2 kilometers left to be repaired. How many kilometers is the total length of this road?
修一条路，第一天修了全长的(1/4)，第二天修了全长的50%，还剩3.2千米没修，这条路全长多少千米？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

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

<gadget id="calculator">3.2 / (1/4)</gadget>
<output>12.8</output>

<result>12.8</result>