Xiaoli reads a book, and she reads 36 pages on the first day, which happens to be the second day (4/5), and the second day (1/4). How many pages does this book have?
小丽看一本书，第一天看了36页，正好是第二天看的(4/5)，第二天看了这本书的(1/4)．这本书有多少页？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">36 / (4/5) / (1/4)</gadget>
<output>180</output>

<result>180</result>