The price of a certain kind of clothes in a shopping mall after a 20% discount is 72 yuan. What is the price of this kind of clothes before the discount?
商场某种衣服打八折后的价钱是72元，这种衣服在未打折时的价钱是多少元．
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">72 / (4/5)</gadget>
<output>90</output>

<result>90</result>