The original price of a product is 450 yuan, and now it is sold at a 10% discount. How much is the current price?
一件商品原价450元，现在打九折销售，现价多少元？
<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">450 * (9/10)</gadget>
<output>405</output>

<result>405</result>