The original price of a piece of clothing is 160 yuan, and it is sold at a discount of 20%, which is how much the price has been reduced
一件衣服原价是160元，按八折优惠出售，就是降价了多少元
<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">160 * (1/5)</gadget>
<output>32</output>

<result>32</result>