A certain kind of clothes in the shopping mall is 72 yuan, how much is it after a 20% discount.
商场某种衣服72元，打八折后是多少元．
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">72 * (4/5)</gadget>
<output>288/5 = around 57.6</output>

<result>288/5 = around 57.6</result>