(78.6-0.786*25+75%*21.4)/15*1997.
(78.6-0.786*25十75%*21.4)/15*1997．
<gadget id="calculator">78.6 - 19.65</gadget>
<output>58.95</output>

<gadget id="calculator">0.75 * 21.4</gadget>
<output>16.05</output>

<gadget id="calculator">58.95 + 16.05</gadget>
<output>75</output>

<gadget id="calculator">75 / 15</gadget>
<output>5</output>

<gadget id="calculator">2_000 - 3</gadget>
<output>1_997</output>

<gadget id="calculator">5 * 1_997</gadget>
<output>9_985</output>

<result>9_985</result>