When Ms. Zhao went to a home appliance store to buy a refrigerator, she participated in a trade-in activity. The new refrigerator was 10% off. Ms. Zhao bought a refrigerator with a price tag of 2,790 yuan. How much should she pay?
赵老师到某家电商场买冰箱时，参加了以旧换新的活动，新冰箱优惠10%，赵老师买了一台标价2790元的冰箱，她应付多少元？
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">2_790 * (9/10)</gadget>
<output>2_511</output>

<result>2_511</result>