Calculation: (1/(1*3))+(1/(3*5))+(1/(5*7))+...+(1/(101*103))=how much.
计算：(1/(1*3))+(1/(3*5))+(1/(5*7))+…+(1/(101*103))=多少．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 103</gadget>
<output>1/103 = around 0.009709</output>

<gadget id="calculator">1 - (1/103)</gadget>
<output>102/103 = around 0.990291</output>

<gadget id="calculator">(1/2) * (102/103)</gadget>
<output>51/103 = around 0.495146</output>

<result>51/103 = around 0.495146</result>