1999-((180+543*374)/(543*375-363)).
1999-((180+543*374)/(543*375-363))．
<gadget id="calculator">543 * 374</gadget>
<output>203_082</output>

<gadget id="calculator">180 + 203_082</gadget>
<output>203_262</output>

<gadget id="calculator">543 * 375</gadget>
<output>203_625</output>

<gadget id="calculator">203_625 - 363</gadget>
<output>203_262</output>

<gadget id="calculator">203_262 / 203_262</gadget>
<output>1</output>

<gadget id="calculator">1_999 - 1</gadget>
<output>1_998</output>

<result>1_998</result>