Xiao Liang reads a story book. He reads (1/5) of the whole book on the first day, and reads 20 pages on the second day, leaving 44 pages unread. How many pages does this book have?
小亮读一本故事书，第一天读了全书的(1/5)，第二天读了20页，还剩下44页没有读，这本书共有多少页？
<gadget id="calculator">20 + 44</gadget>
<output>64</output>

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

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">64 / (4/5)</gadget>
<output>80</output>

<result>80</result>