The original price of a coat is 80 yuan, and it is now on sale with a 20% discount. How much is the current price?
一件上衣原价80元，现打八折出售，现在售价多少元．
<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>