The original price of a piece of clothing is 1,200 yuan. During the "May 1st" period, the mall is selling it at a 15% discount. How much is it cheaper?
一件衣服，原价1200元，"五一"期间商场因搞促销，打八五折出售，便宜多少元？
<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">1_200 * (3/20)</gadget>
<output>180</output>

<result>180</result>