Liangliang read a story book, read 25% of the whole book on the first day, and read the whole book again on the second day (2/7). It is known that I read 5 more pages on the second day than on the first day, how many pages are there in this storybook?
亮亮看一本故事书，第一天看了全书的25%，第二天又看了全书的(2/7)．已知第二天比第一天多看了5页，这本故事书有多少？
<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(2/7) - (1/4)</gadget>
<output>1/28 = around 0.035714</output>

<gadget id="calculator">5 / (1/28)</gadget>
<output>140</output>

<result>140</result>