To build a road, (2/5) of the road was built in the first week, and (1/4) of the road was built in the second week. After another 14 kilometers, the task is completed. How long is this road in kilometers?
修一条公路，第一周修了这条路的(2/5)，第二周修了这条路的(1/4)，再修14千米就完成任务．这条公路全长多少千米？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(2/5) + (1/4)</gadget>
<output>13/20 = around 0.65</output>

<gadget id="calculator">1 - (13/20)</gadget>
<output>7/20 = around 0.35</output>

<gadget id="calculator">14 / (7/20)</gadget>
<output>40</output>

<result>40</result>