Zhao Ming reads a book. (1/8) who read the whole book on the first day. On the second day, I read 12 pages more than the first day, and on the third day I read 6 pages more than the second day, which is exactly half of the book. How many pages does this book have?
赵明读一本书．第一天读了全书的(1/8)．第二天比第一天多读了12页，第三天比第二天多读了6页，这时正好读完全书的一半．这本书有多少页？
<gadget id="calculator">12 + 12 + 6</gadget>
<output>30</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">(1/2) - (1/8) - (1/8) - (1/8)</gadget>
<output>1/8 = around 0.125</output>

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

<result>240</result>