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

<gadget id="calculator">2 - (1/100)</gadget>
<output>199/100 = around 1.99</output>

<result>199/100 = around 1.99</result>