Great discount for Christmas, a pair of sneakers is priced at 240 yuan after a 20% discount, what is the original price?
圣诞节大优惠，一双旅游鞋打8折后售价是240元，原价是多少元．
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">240 / (4/5)</gadget>
<output>300</output>

<result>300</result>