During the event period of a shopping mall, all products are sold at a 20% discount. How much can you save by buying a sportswear with an original price of 180 yuan?
某商场活动期间商品一律按八折出售，买一件原价180元的运动服，可以便宜多少钱？
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 - (4/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">180 * (1/5)</gadget>
<output>36</output>

<result>36</result>