A jacket with an original price of 240 yuan is sold at a 15% discount, which is how much cheaper than the original price.
一件原价240元的上衣打八五折出售，要比原价便宜多少元．
<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">240 * (3/20)</gadget>
<output>36</output>

<result>36</result>