Calculation: the value of (2+4+6+...+2010+2012)*1006-(1+3+5+...+2009+2011)*1007.
计算：(2+4+6+…+2010+2012)*1006-(1+3+5+…+2009+2011)*1007的值．
<gadget id="calculator">2 + 2_012</gadget>
<output>2_014</output>

<gadget id="calculator">1_006 / 2</gadget>
<output>503</output>

<gadget id="calculator">2_014 * 503 * 1_006</gadget>
<output>1_019_120_252</output>

<gadget id="calculator">1_006 * 1_006 * 1_007</gadget>
<output>1_019_120_252</output>

<gadget id="calculator">1_019_120_252 - 1_019_120_252</gadget>
<output>0</output>

<result>0</result>