If 2*1=(1/2), 3*2=(1/33), 4*3=(1/444), then (6*3)/(2*6)=how much.
如果2*1=(1/2)，3*2=(1/33)，4*3=(1/444)，那么(6*3)/(2*6)=多少．
<gadget id="calculator">1 / 666</gadget>
<output>1/666 = around 0.001502</output>

<gadget id="calculator">1 / 222_222</gadget>
<output>1/222_222 = around 0.000005</output>

<gadget id="calculator">(1/666) - (1/222_222)</gadget>
<output>499/333_333 = around 0.001497</output>

<result>499/333_333 = around 0.001497</result>