When Xiao Ming reads a book, he has already read (2/5) of the whole book, and the 56 pages are still less than half of the book. How many pages does this book have?
小明看一本书，已经看了全书的(2/5)，还差56页不到这本书的一半．这本书有多少页？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(1/2) - (2/5)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">56 / (1/10)</gadget>
<output>560</output>

<result>560</result>