Calculation: (1/(1*2))+(1/(2*3))+(1/(3*4))+…+(1/(10*11)).
计算：(1/(1*2))+(1/(2*3))+(1/(3*4))+…+(1/(10*11))．
<gadget id="calculator">1 / 11</gadget>
<output>1/11 = around 0.090909</output>

<gadget id="calculator">1 - (1/11)</gadget>
<output>10/11 = around 0.909091</output>

<result>10/11 = around 0.909091</result>