May Day is approaching, and the shopping mall is carrying out promotional activities. The air conditioner with the original price of 3,600 yuan is sold at a 20% discount. In this way, it is much cheaper than before.
五一快到了，商场进行促销活动，原价3600元的空调按8折出售，这样，比原来便宜了多少元．
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 - (4/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">3_600 * (1/5)</gadget>
<output>720</output>

<result>720</result>