Simple calculation: 8+2001*((1/8)-(1/2009))+8*((1/2001)-(1/2009))-2009*((1/8)+(1/2001 )).
简便运算：8+2001*((1/8)-(1/2009))+8*((1/2001)-(1/2009))-2009*((1/8)+(1/2001))．
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">1 / 2_009</gadget>
<output>1/2_009 = around 0.000498</output>

<gadget id="calculator">(1/8) - (1/2_009)</gadget>
<output>2_001/16_072 = around 0.124502</output>

<gadget id="calculator">2_001 * (2_001/16_072)</gadget>
<output>4_004_001/16_072 = around 249.128982</output>

<gadget id="calculator">1 / 2_001</gadget>
<output>1/2_001 = around 0.0005</output>

<gadget id="calculator">(1/2_001) - (1/2_009)</gadget>
<output>8/4_020_009 = around 0.000002</output>

<gadget id="calculator">8 * (8/4_020_009)</gadget>
<output>64/4_020_009 = around 0.000016</output>

<gadget id="calculator">(1/8) + (1/2_001)</gadget>
<output>2_009/16_008 = around 0.1255</output>

<gadget id="calculator">2_009 * (2_009/16_008)</gadget>
<output>4_036_081/16_008 = around 252.128998</output>

<gadget id="calculator">(64/4_020_009) - (4_036_081/16_008)</gadget>
<output>-4_052_217/16_072 = around -252.128982</output>

<gadget id="calculator">8 + (4_004_001/16_072) + (-4_052_217/16_072)</gadget>
<output>5</output>

<result>5</result>