copy of "Children's Stories" is 6 yuan cheaper after 25% off, how much is the original price?
一本《儿童故事》七五折后经原来便宜6元，原价是多少元？
<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 - (3/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">6 / (1/4)</gadget>
<output>24</output>

<result>24</result>