Xiao Ming reads a story book. On the first day, he reads (1/4) of the whole book. On the second day, he reads 2 more pages than on the first day. There are 40 pages left. How many pages are there in this book?
小明看一本故事书，第一天看了全书的(1/4)，第二天比第一天多看2页，还剩40页没看，这本书一共有多少页？
<gadget id="calculator">2 + 40</gadget>
<output>42</output>

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

<gadget id="calculator">1 - (1/4) - (1/4)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">42 / (1/2)</gadget>
<output>84</output>

<result>84</result>