2004/((1998**2-(1998-1))/(1998**2-1998*1997+1997**2)).
2004/((1998**2-(1998-1))/(1998**2-1998*1997+1997**2))．
<gadget id="calculator">1_998 ** 2</gadget>
<output>3_992_004</output>

<gadget id="calculator">1_998 - 1</gadget>
<output>1_997</output>

<gadget id="calculator">3_992_004 - 1_997</gadget>
<output>3_990_007</output>

<gadget id="calculator">1_998 * 1_997</gadget>
<output>3_990_006</output>

<gadget id="calculator">3_992_004 - 3_990_006</gadget>
<output>1_998</output>

<gadget id="calculator">1_997 ** 2</gadget>
<output>3_988_009</output>

<gadget id="calculator">1_998 + 3_988_009</gadget>
<output>3_990_007</output>

<gadget id="calculator">3_990_007 / 3_990_007</gadget>
<output>1</output>

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

<result>2_004</result>