A car has driven from place A to place B, and has gone the whole way (1/3), 18 kilometers away from the midpoint. How many miles is it from A to B?
一辆汽车从甲地开往乙地，已经行了全程的(1/3)，离中点18千米．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">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">18 / (1/6)</gadget>
<output>108</output>

<result>108</result>