In a promotional event in a supermarket, a piece of clothing is sold at a 20% discount, which is 30 yuan cheaper. How much is the original price of this piece of clothing?
某超市促销活动，一件衣服打八折出售，便宜了30元，这件衣服的原价多少元？
<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">30 / (1/5)</gadget>
<output>150</output>

<result>150</result>