Xiaojun rides a bicycle from place A to place B. After walking 2/5 of the whole journey, he is still 2 kilometers away from the midpoint of the whole journey. How many kilometers is it from place A to place B?
小军骑自行车从甲地到乙地，走了全程的(2/5)后离全程中点还有2千米，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 - (1/2) - (2/5)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">2 / (1/10)</gadget>
<output>20</output>

<result>20</result>