Ulan read a book, read (1/3) of the whole book on the first day, (1/4) of the whole book on the second day, and finished the book after reading 25 pages on the third day. How many pages does this book have?
乌兰看了一本书，第一天看了全书的(1/3)，第二天看了全书的(1/4)，第三天看25页就看完了这本书．这本书有多少页？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

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

<gadget id="calculator">1 - (1/3) - (1/4)</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">25 / (5/12)</gadget>
<output>60</output>

<result>60</result>