The original price of a suit is 2,400 yuan, and it is now on sale at a 15% discount. How much is it cheaper than before?
一件西服原价2400元，现在打八五折出售．比原来便宜了多少元？
<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">2_400 * (3/20)</gadget>
<output>360</output>

<result>360</result>