The original price of a coat is 300 yuan, and now it is sold at a 20% discount. How much should it be sold for?
一件上衣原价300元，现按八折出售，应卖多少元．
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">300 * (4/5)</gadget>
<output>240</output>

<result>240</result>