The current price of a piece of clothing is 80 yuan, which is 1/5 cheaper than the original price. How much is the original price of this piece of clothing?
一件衣服现价80元，比原价便宜了(1/5)，这件衣服原价是多少元？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">80 / (4/5)</gadget>
<output>100</output>

<result>100</result>