Calculation: (1-(1/2))*((1/2)-(1/3))*((1/3)-(1/4))*((1/4)-(1/ 5))*((1/5)-(1/6))=how much.
计算：(1-(1/2))*((1/2)-(1/3))*((1/3)-(1/4))*((1/4)-(1/5))*((1/5)-(1/6))=多少．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 - (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">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/3) - (1/4)</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/4) - (1/5)</gadget>
<output>1/20 = around 0.05</output>

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

<gadget id="calculator">(1/5) - (1/6)</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">(1/2) * (1/6) * (1/12) * (1/20) * (1/30)</gadget>
<output>1/86_400 = around 0.000012</output>

<result>1/86_400 = around 0.000012</result>