A piece of clothing is 45 yuan cheaper after a 10% discount. What is the original price of this piece of clothing?
一件衣服，打九折后便宜了45元，这件衣服原价多少元．
<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">1 - (9/10)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">45 / (1/10)</gadget>
<output>450</output>

<result>450</result>