Wang Jia read (1/4) of the whole book on the first day, and (1/5) of the whole book on the second day. There are 22 pages left. How many pages does this book have?
王佳第一天看了整本书的(1/4)，第二看了整书的(1/5)，还剩22页，这本书共有多少页？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

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

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

<gadget id="calculator">22 / (11/20)</gadget>
<output>40</output>

<result>40</result>