From A to B, the whole journey (2/3) is done, and the distance from the midpoint is 16.5 kilometers. How many kilometers are there between A and B?
从甲地到乙地，行了全程的(2/3)，离中点16.5千米，甲乙两地相距多少千米？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

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

<gadget id="calculator">16.5 / (1/6)</gadget>
<output>99</output>

<result>99</result>