The road repair team wants to build a road. They repaired 1/4 of the total length in the first week, and 20% of the total length in the second week. There are 440 kilometers left to be repaired. How many kilometers is the total length of this road?
修路队要修一条公路，第一周修了全长的(1/4)，第二周修了全长的20%，还剩440千米没有修，这条公路全长有多少千米？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

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

<gadget id="calculator">440 / (11/20)</gadget>
<output>800</output>

<result>800</result>