Children's clothing stores have seasonal promotions. The original price of each short-sleeved item is 50 yuan, and it is now on sale with a 20% discount. How much is the current price?
少年服饰专卖店换季促销，每件短袖原价50元，现在八折销售．现价多少元？
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">50 * (4/5)</gadget>
<output>40</output>

<result>40</result>