A piece of clothing is 120 yuan after a 20% discount. How much is the original price?
一件衣服降价打八折后是120元，原价是多少元？
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">120 / (4/5)</gadget>
<output>150</output>

<result>150</result>