The original price of a coat is 120 yuan, and now it is sold at a 20% discount. How much is this coat cheaper?
一件上衣原价120元，现在打八折销售，这件上衣便宜了多少钱？
<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">120 * (1/5)</gadget>
<output>24</output>

<result>24</result>