The selling price of a book after 25% off is 24 yuan. What is the original price of this book?
一本书打七五折后的售价是24元，这个书的原价是多少元．
<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">24 / (3/4)</gadget>
<output>32</output>

<result>32</result>