Mr. Li reads a book. He reads (1/5) of the whole book on the first day and (1/4) of the whole book on the second day. There are still 88 pages left. How many pages does this book have?
李老师看一本书，第一天看了全书的(1/5)，第二天看了全书的(1/4)，还剩下88页没有看，这本书共有多少页？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/5) - (1/4)</gadget>
<output>11/20 = around 0.55</output>

<gadget id="calculator">88 / (11/20)</gadget>
<output>160</output>

<result>160</result>