A car has traveled the whole distance (3/5) from Nanjing to Shanghai. At this time, the car is 120 kilometers away from Shanghai. How many kilometers is the distance between Nanjing and Shanghai?
一辆汽车从南京开往上海，已经行了全程的(3/5)，这时汽车距上海120千米．南京到上海相距多少千米？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">120 / (2/5)</gadget>
<output>300</output>

<result>300</result>