There are 10 pieces of casual clothes in the clothing store, the original price is 180 yuan each, but actually 6 pieces are sold at 10% off, and 4 pieces are sold at 30% off. How much less are these clothes sold than before?
服装店有10件休闲服，原价每件180元，实际有6件以九折出售，4件以七折出售．这批服装比原来少卖多少元？
<gadget id="calculator">180 * 10</gadget>
<output>1_800</output>

<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">180 * (9/10) * 6</gadget>
<output>972</output>

<gadget id="calculator">70 / 100</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">180 * (7/10) * 4</gadget>
<output>504</output>

<gadget id="calculator">972 + 504</gadget>
<output>1_476</output>

<gadget id="calculator">1_800 - 1_476</gadget>
<output>324</output>

<result>324</result>