Children's clothing stores have seasonal promotions. The original price of each half-sleeve is 50 yuan, and now it is 20% off. Xiaolin bought three pieces, how much did he spend in total?
少年服饰专卖店换季促销，每件半袖原价50元，现在八折销售．小林买了三件，一共花了多少钱？
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">50 * (4/5) * 3</gadget>
<output>120</output>

<result>120</result>