Xiaohong bought a story book, she read 12 pages a day, and she read 20% of the book in 5 days. According to this calculation, how many days will it take to finish reading this book?
小红买了一本故事书，她每天看12页，结果5天看了这本书的20%．照这样计算，看完这本书共要多少天？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/5) / 5</gadget>
<output>1/25 = around 0.04</output>

<gadget id="calculator">1 / (1/25)</gadget>
<output>25</output>

<result>25</result>