A top is 72 yuan per piece when it is sold at a 40% discount. If it is sold at a 20% discount, how much is each piece.
一件上衣，六折出售时每件72元，若是八折出售，每件多少元．
<gadget id="calculator">60 / 100</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">72 / (3/5)</gadget>
<output>120</output>

<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">120 * (4/5)</gadget>
<output>96</output>

<result>96</result>