When Xiaofang reads a book, the ratio of the number of pages she has read to the number of remaining pages is 2:3. If she reads another 56 pages, she has read 75% of the entire book. How many pages does this book have?
小芳看一本书，已看的页数与剩下的页数比是2：3，如果再看56页，正好看完全书的75%，这本书一共有多少页？
<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">2 + 3</gadget>
<output>5</output>

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

<gadget id="calculator">(3/4) - (2/5)</gadget>
<output>7/20 = around 0.35</output>

<gadget id="calculator">56 / (7/20)</gadget>
<output>160</output>

<result>160</result>