When Xiaohua reads a storybook, what he has read is equivalent to what he has not read (9/13). The unread storybook is 16 pages longer than the one he has read. How many pages does this book have?
小华看一本故事书，看过的相当于没看过的(9/13)，没看过的比看过的多16页．这本书有多少页？
<gadget id="calculator">9 / 13</gadget>
<output>9/13 = around 0.692308</output>

<gadget id="calculator">1 - (9/13)</gadget>
<output>4/13 = around 0.307692</output>

<gadget id="calculator">16 / (4/13)</gadget>
<output>52</output>

<gadget id="calculator">52 * (9/13)</gadget>
<output>36</output>

<gadget id="calculator">52 + 36</gadget>
<output>88</output>

<result>88</result>