Liu Qiang reads a story book, reads 15% of all the pages on the first day, and reads 8 more pages on the second day than on the first day. At this time, the pages he has read account for (2/5) of the total pages. How many pages does this storybook have?
刘强看一本故事书，第一天看了全部页数的15%，第二天比第一天多看8页，这时已看的页数占全部页数的(2/5)，这本故事书共有多少页？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">(2/5) - (3/20) - (3/20)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">8 / (1/10)</gadget>
<output>80</output>

<result>80</result>