A section of road has been built, 80% of the total length has been repaired, and there are still 1.2 kilometers left. How many kilometers is this road?
修一段路，已经修了全长的80%，还剩下1.2千米．这段路全长多少千米？
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

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

<gadget id="calculator">1.2 / (1/5)</gadget>
<output>6</output>

<result>6</result>