In a bookstore, a "Pleasant Goat" book is priced at 28 yuan after a 20% price cut. What is the original price of this book?
某书店，一款"喜羊羊"书降价20%后售价是28元，原来这本书售价是多少元．
<gadget id="calculator">20 / 100</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">28 / (4/5)</gadget>
<output>35</output>

<result>35</result>