If the air conditioner with the original price of 2,800 yuan is sold at a 15% discount, how much is the price of the air conditioner cheaper than the original price?
原价2800元的空调打八五折销售，则该空调的售价比原价便宜了多少元？
<gadget id="calculator">85 / 100</gadget>
<output>17/20 = around 0.85</output>

<gadget id="calculator">2_800 * (17/20)</gadget>
<output>2_380</output>

<gadget id="calculator">2_800 - 2_380</gadget>
<output>420</output>

<result>420</result>