Calculation: (2/(2*4))+(2/(4*6))+(2/(6*8))+…+(2/(98*100)).
计算：(2/(2*4))+(2/(4*6))+(2/(6*8))+…+(2/(98*100))．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 100</gadget>
<output>1/100 = around 0.01</output>

<gadget id="calculator">(1/2) - (1/100)</gadget>
<output>49/100 = around 0.49</output>

<result>49/100 = around 0.49</result>