During the 8th National Paralympic Games, the mascot "Yueyue" pendant is sold at a 20% discount for 80 yuan. What is the original price?
第八届全国残疾人运动会期间，吉祥物"悦悦"吊坠按八折出售，卖80元，原价是多少元．
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

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

<result>100</result>