The original price of a pair of trousers is 40 yuan, and they are sold at a 20% discount. What is the current price?
一条裤子原价40元，打八折销售，现价多少元．
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">40 * (4/5)</gadget>
<output>32</output>

<result>32</result>