Xiao Ming finished reading a book in 3 days. On the first day, he read (1/8) of the whole book, on the second day he read the remaining pages (2/7), and on the second day he read 30 pages more than the first day. How many pages does this book have?
小明3天看完一本书，第一天看了全书的(1/8)，第二天看了余下页数的(2/7)，第二天比第一天多看了30页，这本书有多少页？
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">1 - (1/8)</gadget>
<output>7/8 = around 0.875</output>

<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">(7/8) * (2/7)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/4) - (1/8)</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">30 / (1/8)</gadget>
<output>240</output>

<result>240</result>