A shopping mall "Mother's Day" rewards, all clothes will be sold at a 20% price reduction. Mom has a membership card, and she can get another 10% discount. Mom bought a set of clothes and spent 450 yuan. How much is the original price of this suit?
某商场"母亲节"酬宾，服装一律降价20%销售．妈妈有会员卡，还可以再打九折，妈妈买了一套衣服，花了450元，这套衣服原价是多少元？
<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>