(2000-1)+(1999-2)+(1998-3)+…+(1002-999)+(1001-1000)
(2000-1)+(1999-2)+(1998-3)+…+(1002-999)+(1001-1000)
<gadget id="calculator">1_000 * 1_000</gadget>
<output>1_000_000</output>

<result>1_000_000</result>