(2/(3*5))+(2/(5*7))+(2/(7*9))+(2/(9*11))+…+(2/(97*99) )+(2/(99*101))=how much.
(2/(3*5))+(2/(5*7))+(2/(7*9))+(2/(9*11))+…+(2/(97*99))+(2/(99*101))=多少．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 / 101</gadget>
<output>1/101 = around 0.009901</output>

<gadget id="calculator">(1/3) - (1/101)</gadget>
<output>98/303 = around 0.323432</output>

<result>98/303 = around 0.323432</result>