Calculation: ((1/2)+(1/4)+(1/6)+(1/8))-((1/3)+(1/6)+(1/9)+(1/ 12))+((1/4)+(1/8)+(1/12)+(1/16))-((1/5)+(1/10)+(1/15)+( 1/20))
计算：((1/2)+(1/4)+(1/6)+(1/8))-((1/3)+(1/6)+(1/9)+(1/12))+((1/4)+(1/8)+(1/12)+(1/16))-((1/5)+(1/10)+(1/15)+(1/20))
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<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 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/2) + (1/3) + (1/4)</gadget>
<output>13/12 = around 1.083333</output>

<gadget id="calculator">(1/6) * (13/12)</gadget>
<output>13/72 = around 0.180556</output>

<gadget id="calculator">1 / 20</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">(1/20) * (13/12)</gadget>
<output>13/240 = around 0.054167</output>

<gadget id="calculator">(13/72) + (13/240)</gadget>
<output>169/720 = around 0.234722</output>

<result>169/720 = around 0.234722</result>