(1/(1*3))+(1/(3*5))+(1/(5*7))+(1/(7*9))+(1/(9*11))+ ...(1/(97*99))+(1/(99*101))=
(1/(1*3))+(1/(3*5))+(1/(5*7))+(1/(7*9))+(1/(9*11))+…(1/(97*99))+(1/(99*101))=
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

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

<gadget id="calculator">1 - (1/101)</gadget>
<output>100/101 = around 0.990099</output>

<gadget id="calculator">(1/2) * (100/101)</gadget>
<output>50/101 = around 0.49505</output>

<result>50/101 = around 0.49505</result>