(1/2)*(1/33)+(1/3)*(1/33)+(1/6)*(1/33)-(1/33)=how much.
(1/2)*(1/33)+(1/3)*(1/33)+(1/6)*(1/33)-(1/33)=多少．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 33</gadget>
<output>1/33 = around 0.030303</output>

<gadget id="calculator">(1/2) * (1/33)</gadget>
<output>1/66 = around 0.015152</output>

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

<gadget id="calculator">(1/3) * (1/33)</gadget>
<output>1/99 = around 0.010101</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">(1/6) * (1/33)</gadget>
<output>1/198 = around 0.005051</output>

<gadget id="calculator">(1/198) - (1/33)</gadget>
<output>-5/198 = around -0.025253</output>

<gadget id="calculator">(1/66) + (1/99) + (-5/198)</gadget>
<output>0</output>

<result>0</result>