(1+3+5+7+…+1999)-(2+4+6+8+…+1998)
(1+3+5+7+…+1999)-(2+4+6+8+…+1998)
<gadget id="calculator">1 + 1_999</gadget>
<output>2_000</output>

<gadget id="calculator">1_000 / 2</gadget>
<output>500</output>

<gadget id="calculator">2_000 * 500</gadget>
<output>1_000_000</output>

<gadget id="calculator">2 + 1_998</gadget>
<output>2_000</output>

<gadget id="calculator">999 / 2</gadget>
<output>999/2 = around 499.5</output>

<gadget id="calculator">2_000 * (999/2)</gadget>
<output>999_000</output>

<gadget id="calculator">1_000_000 - 999_000</gadget>
<output>1_000</output>

<result>1_000</result>