Calculation: (1/(2*4))+(1/(4*6))+(1/(6*8))+…+(1/(100*102)).
计算：(1/(2*4))+(1/(4*6))+(1/(6*8))+…+(1/(100*102))．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 102</gadget>
<output>1/102 = around 0.009804</output>

<gadget id="calculator">(1/2) - (1/102)</gadget>
<output>25/51 = around 0.490196</output>

<gadget id="calculator">(25/51) * (1/2)</gadget>
<output>25/102 = around 0.245098</output>

<result>25/102 = around 0.245098</result>