Xiao Ming walked the whole distance (1/3) from A to B. At this time, the distance from the midpoint is 12 kilometers. How many kilometers are there between A and B?
小明从甲地到乙地，走了全程的(1/3)，这时离中点的距离是12千米，甲乙两地相距多少千米？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(1/2) - (1/3)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">12 / (1/6)</gadget>
<output>72</output>

<result>72</result>