There is a calculator in the canteen. The original price is 72 yuan. What is the price after the 20% discount?
小卖部有一种计算器，原价是72元，八折后的价钱是多少？
<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>