The price of a piece of clothing is 180 yuan, which is 25% lower than the original price. How much is the original price of this dress?
一件衣服售价180元，比原价降低了25%．这件衣服原价多少元？
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">180 / (3/4)</gadget>
<output>240</output>

<result>240</result>