For a book, Xiao Ming reads (1/4) of the whole book on the first day, and starts from page 80 on the second day. How many pages does this book have?
一本书，小明第一天看了全书的(1/4)，第二天从80页开始看起，这本书一共有多少页？
<gadget id="calculator">80 - 1</gadget>
<output>79</output>

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

<gadget id="calculator">79 / (1/4)</gadget>
<output>316</output>

<result>316</result>