To build a road, 25% of the road was repaired in the first week, and 1/5 of the road was repaired in the second week. A total of 270 kilometers was repaired in two weeks. How long is this road in kilometers?
修一段公路，第一周修了这段公路的25%，第二周修了这段公路的(1/5)，两周共修了270千米．这段公路全长多少千米？
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

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

<gadget id="calculator">(1/4) + (1/5)</gadget>
<output>9/20 = around 0.45</output>

<gadget id="calculator">270 / (9/20)</gadget>
<output>600</output>

<result>600</result>