"Thanksgiving" discount clothing will be reduced by 20%. I have a discount card and can get another 10% discount. Mom bought a set of clothes for 450 yuan. How much is the original price of this suit?
"感恩节"酬宾服装一律降价20%，我有优惠卡还可以再打九折，妈妈买了一套衣服花了450元钱，这套衣服原价多少元？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">(4/5) * (9/10)</gadget>
<output>18/25 = around 0.72</output>

<gadget id="calculator">450 / (18/25)</gadget>
<output>625</output>

<result>625</result>