Xiao Ming reads a science fiction book. He reads 40 pages on the first day, and (1/5) of the whole book on the second day. How many pages does the book have?
小明看一本科幻书，第一天看了40页，第二天看了全书的(1/5)，第二天看的页数恰好比第一天多看(1/4)，这本书一共有多少页？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + (1/4)</gadget>
<output>5/4 = around 1.25</output>

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

<gadget id="calculator">(5/4) / (1/5)</gadget>
<output>25/4 = around 6.25</output>

<gadget id="calculator">40 * (25/4)</gadget>
<output>250</output>

<result>250</result>