Calculate (2008+2006+…+6+4+2)-(1+3+5+…+2005+2007)
计算(2008+2006+…+6+4+2)-(1+3+5+…+2005+2007)
<gadget id="calculator">2_008 + 2</gadget>
<output>2_010</output>

<gadget id="calculator">1_004 / 2</gadget>
<output>502</output>

<gadget id="calculator">2_010 * 502</gadget>
<output>1_009_020</output>

<gadget id="calculator">2_007 + 1</gadget>
<output>2_008</output>

<gadget id="calculator">2_008 * 502</gadget>
<output>1_008_016</output>

<gadget id="calculator">1_009_020 - 1_008_016</gadget>
<output>1_004</output>

<result>1_004</result>