Calculation: ((2008+2007*2009)/(2008*2009-1))+((2009+2008*2010)/(2009*2010-1))+((2010+2009*2011)/(2010* 2011-1))+((2011+2010*2012)/(2011*2012-1))=how much.
计算：((2008+2007*2009)/(2008*2009-1))+((2009+2008*2010)/(2009*2010-1))+((2010+2009*2011)/(2010*2011-1))+((2011+2010*2012)/(2011*2012-1))=多少．
<gadget id="calculator">2_007 * 2_009</gadget>
<output>4_032_063</output>

<gadget id="calculator">2_008 + 4_032_063</gadget>
<output>4_034_071</output>

<gadget id="calculator">2_008 * 2_009</gadget>
<output>4_034_072</output>

<gadget id="calculator">4_034_072 - 1</gadget>
<output>4_034_071</output>

<gadget id="calculator">4_034_071 / 4_034_071</gadget>
<output>1</output>

<gadget id="calculator">2_008 * 2_010</gadget>
<output>4_036_080</output>

<gadget id="calculator">2_009 + 4_036_080</gadget>
<output>4_038_089</output>

<gadget id="calculator">2_009 * 2_010</gadget>
<output>4_038_090</output>

<gadget id="calculator">4_038_090 - 1</gadget>
<output>4_038_089</output>

<gadget id="calculator">4_038_089 / 4_038_089</gadget>
<output>1</output>

<gadget id="calculator">2_009 * 2_011</gadget>
<output>4_040_099</output>

<gadget id="calculator">2_010 + 4_040_099</gadget>
<output>4_042_109</output>

<gadget id="calculator">2_010 * 2_011</gadget>
<output>4_042_110</output>

<gadget id="calculator">4_042_110 - 1</gadget>
<output>4_042_109</output>

<gadget id="calculator">4_042_109 / 4_042_109</gadget>
<output>1</output>

<gadget id="calculator">2_010 * 2_012</gadget>
<output>4_044_120</output>

<gadget id="calculator">2_011 + 4_044_120</gadget>
<output>4_046_131</output>

<gadget id="calculator">2_011 * 2_012</gadget>
<output>4_046_132</output>

<gadget id="calculator">4_046_132 - 1</gadget>
<output>4_046_131</output>

<gadget id="calculator">4_046_131 / 4_046_131</gadget>
<output>1</output>

<gadget id="calculator">1 + 1 + 1 + 1</gadget>
<output>4</output>

<result>4</result>