Xiaoli finished a book in three days. She read (1/5) of the whole book on the first day, (2/5) of the whole book on the second day, and read 8 pages more than the first day. How many pages does the book have?
小丽三天看完一本书，第一天看了全书的(1/5)，第二天看了全书的(2/5)，第二比第一天多看了8页，这本书共有多少页？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(2/5) - (1/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">8 / (1/5)</gadget>
<output>40</output>

<result>40</result>