There is a piece of clothing in a fashion store. On the first day, it is sold at the original price, but no one buys it; on the second day, it is sold at 20% off the original price, but no one buys it; ． It is known that the selling price is exactly 1425 of the original price. How much is the original price of this dress?
时装店有一件衣服，第一天按原价出售，没人买；第二天按原价的八折出售，仍没人买；第三天在第二天的基础上再降价120元，终于售出．已知出售价格恰好是原价的1425．这件衣服原价是多少元？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">14 / 25</gadget>
<output>14/25 = around 0.56</output>

<gadget id="calculator">(4/5) - (14/25)</gadget>
<output>6/25 = around 0.24</output>

<gadget id="calculator">120 / (6/25)</gadget>
<output>500</output>

<result>500</result>