Calculation: ((1/2)-1)*((1/3)-1)*((1/4)-1)*((1/5)-1)*…*((1/11) -1).
计算：((1/2)-1)*((1/3)-1)*((1/4)-1)*((1/5)-1)*…*((1/11)-1)．
<gadget id="calculator">1 / 11</gadget>
<output>1/11 = around 0.090909</output>

<result>1/11 = around 0.090909</result>