The original price of a piece of clothing is 80 yuan, and it is sold at a 20% discount, what is the current price?
一件衣服原价是80元，打八折销售，则现价是多少．
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">80 * (4/5)</gadget>
<output>64</output>

<result>64</result>