The price of a book with a 25% price reduction is 36 yuan. What is the original price?
一本书降价25%的售价是36元，原价是多少元．
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">36 / (3/4)</gadget>
<output>48</output>

<result>48</result>