Donald Duck rides a bicycle from A to B, and travels the whole distance (2/5) in 2 hours, 6 kilometers away from the midpoint, so how many kilometers is it from A to B?
唐老鸭骑自行车从甲地驶往乙地，2小时行了全程的(2/5)，离中点6千米，那么从甲地到乙地有多少千米？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(1/2) - (2/5)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">6 / (1/10)</gadget>
<output>60</output>

<result>60</result>