Calculation: (1/(1*2))+(1/(2*3))+(1/(3*4))+...+(1/(99*100))=how much.
计算：(1/(1*2))+(1/(2*3))+(1/(3*4))+…+(1/(99*100))=多少．
<gadget id="calculator">1 / 100</gadget>
<output>1/100 = around 0.01</output>

<gadget id="calculator">1 - (1/100)</gadget>
<output>99/100 = around 0.99</output>

<result>99/100 = around 0.99</result>