A bus travels the whole distance (3/5) from place A to place B. At this time, it is still 538 kilometers away from place B. How many kilometers has this bus traveled?
一辆客车从甲地开往乙地，行了全程的(3/5)，这时距乙地还有538千米，这辆客车已经行了多少千米？
<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">538 / (2/5)</gadget>
<output>1_345</output>

<gadget id="calculator">1_345 - 538</gadget>
<output>807</output>

<result>807</result>