Calculation: ((1(2/3)+2(3/4)+3(4/5)+…+2008(2009/2010)+2009(2010/2011))/(3(1/3)+ 5(2/4)+7(3/5)+...+4017(2008/2010)+4019(2009/2011))).
计算：((1(2/3)+2(3/4)+3(4/5)+…+2008(2009/2010)+2009(2010/2011))/(3(1/3)+5(2/4)+7(3/5)+…+4017(2008/2010)+4019(2009/2011)))．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>