Chongbai shopping mall is celebrating "New Year's Day" promotional activities. After discounting 40% off a piece of clothing, the profit is 100 yuan, and the price is 300 yuan. How much is the original price of this piece of clothing?
重百商场在庆"元旦"的促销活动中，一件衣服打4折后，还让利100元，售价为300元，这件衣服原价多少元？
<gadget id="calculator">300 + 100</gadget>
<output>400</output>

<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">400 / (2/5)</gadget>
<output>1_000</output>

<result>1_000</result>