The price of a certain kind of clothes after a 20% discount in the shopping mall is 72 yuan. What is the original price of this kind of clothes?
商场某种衣服打八折后的价钱是72元，这种衣服原价是多少元．
<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>