There is a discount in a shopping mall. The original price of a washing machine is 1,800 yuan. How much does it cost to sell it with a 10% discount?
某商场打折，一台洗衣机原价1800元，打九折出售要多少钱？
<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">1_800 * (9/10)</gadget>
<output>1_620</output>

<result>1_620</result>