After a road has been built for 8 kilometers, it is exactly (1/5) of its full length. What is the total length of this road in kilometers?
一条路修了8千米后，正好修了全长的(1/5)，这条路全长多少千米．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">8 / (1/5)</gadget>
<output>40</output>

<result>40</result>