The original price of a coat is 280 yuan, and the trousers are 120 yuan. During the holiday season, there will be a 15% discount. Now, how much is each set of clothes cheaper?
一件上衣原价280元，裤子120元．节日期间一律打八五折，现在每套衣服便宜多少元．
<gadget id="calculator">280 + 120</gadget>
<output>400</output>

<gadget id="calculator">85 / 100</gadget>
<output>17/20 = around 0.85</output>

<gadget id="calculator">1 - (17/20)</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">400 * (3/20)</gadget>
<output>60</output>

<result>60</result>