Calculation: 2004**2-2003*2005.
计算：2004**2-2003*2005．
<gadget id="calculator">2_004 ** 2</gadget>
<output>4_016_016</output>

<gadget id="calculator">2_003 * 2_005</gadget>
<output>4_016_015</output>

<gadget id="calculator">4_016_016 - 4_016_015</gadget>
<output>1</output>

<result>1</result>