After a 20% discount on a coat, it is 150 yuan cheaper. How much is the original price of this coat?
一件大衣打八折后，便宜了150元，这件衣服原价是多少元？
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 - (4/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">150 / (1/5)</gadget>
<output>750</output>

<result>750</result>