The original price of a coat is 350 yuan, how much is it if you sell it with a 20% discount?
一件上衣原价350元，打八折出售是多少元．
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">350 * (4/5)</gadget>
<output>280</output>

<result>280</result>