The original price of a certain commodity is 450 yuan, and it is now on sale at a 20% discount. How much is the current price.
某种商品原价是450元，现在打八折出售．现在的售价是多少元．
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">450 * (4/5)</gadget>
<output>360</output>

<result>360</result>