The original price of a set of clothes is 450 yuan, and it is sold at a 10% discount. What is the current price?
一套衣服原价450元，打9折出售，现价是多少元．
<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>