Xiao Ming reads a book, reads 20% of the whole book on the first day, and reads 18 more pages on the second day than on the first day. At this time, the ratio of the number of pages read to the number of pages not read is 5:6. How many pages does this book have?
小明看一本书，第一天看了全书的20%，第二天比第一天多看了18页，这时已看页数和未看的页数比是5：6．这本书共有多少页？
<gadget id="calculator">5 + 6</gadget>
<output>11</output>

<gadget id="calculator">5 / 11</gadget>
<output>5/11 = around 0.454545</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(5/11) - (1/5) - (1/5)</gadget>
<output>3/55 = around 0.054545</output>

<gadget id="calculator">18 / (3/55)</gadget>
<output>330</output>

<result>330</result>