Calculation: 2**2+4**2+6**2+...+2004**2.
计算：2**2+4**2+6**2+…+2004**2．
<gadget id="calculator">1_002 + 1</gadget>
<output>1_003</output>

<gadget id="calculator">2 * 1_002</gadget>
<output>2_004</output>

<gadget id="calculator">2_004 + 1</gadget>
<output>2_005</output>

<gadget id="calculator">2_005 / 6</gadget>
<output>2_005/6 = around 334.166667</output>

<gadget id="calculator">4 * 1_002 * 1_003 * (2_005/6)</gadget>
<output>1_343_358_020</output>

<result>1_343_358_020</result>