After a 15% discount, the price of a coat is 75 yuan cheaper than the original price. How much is the original price of this coat?
一件大衣打八五折后价格比原来便宜了75元，这件大衣原来价格是多少元？
<gadget id="calculator">85 / 100</gadget>
<output>17/20 = around 0.85</output>

<gadget id="calculator">1 - (17/20)</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">75 / (3/20)</gadget>
<output>500</output>

<result>500</result>