There are 25 science and technology books in Wang Chao's bookcase, which is equivalent to (5/9) of literature and art books, and the number of literature and art books is equivalent to (5/12) of all books. How many books are there in Wang Chao's bookcase? ?
王超的书橱里有科技书25册，相当于文艺书的(5/9)，文艺书的册数又相当于全部图书册数的(5/12)，王超的书橱里共有多少本书？
<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">5 / 12</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">25 / (5/9) / (5/12)</gadget>
<output>108</output>

<result>108</result>