Calculation: (2/(1*3))+(2/(3*5))+(2/(5*7))+…+(2/(97*99)).
计算：(2/(1*3))+(2/(3*5))+(2/(5*7))+…+(2/(97*99))．
<gadget id="calculator">1 / 99</gadget>
<output>1/99 = around 0.010101</output>

<gadget id="calculator">1 - (1/99)</gadget>
<output>98/99 = around 0.989899</output>

<result>98/99 = around 0.989899</result>