20% of the total length of the road is built on the first day, and the ratio of the distance repaired on the second day to the first day is 5:4. There are still 220 meters left to be repaired. How long is this road in meters?
修一条公路，第一天修了全长的20%，第二天与第一天所修路程的比是5：4，还剩下220米没修，这条路全长多少米？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">5 / 4</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">(1/5) * (5/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/5) - (1/4)</gadget>
<output>11/20 = around 0.55</output>

<gadget id="calculator">220 / (11/20)</gadget>
<output>400</output>

<result>400</result>