Xiao Ming reads a book and has already read it (1/3), and reads the 16th page and then reads the complete book (3/5), how many pages does this book have?
小明看一本书，已经看完了(1/3)，再看16页就看完全书的(3/5)，这本书有多少页？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(3/5) - (1/3)</gadget>
<output>4/15 = around 0.266667</output>

<gadget id="calculator">16 / (4/15)</gadget>
<output>60</output>

<result>60</result>