A road has been built for 3 kilometers, and it is just (1/5) repaired. What is the total length of this road in kilometers?
一条公路已经修了3千米，正好修了(1/5)，这条公路总长是多少千米．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">3 / (1/5)</gadget>
<output>15</output>

<result>15</result>