Xiao Ming reads a book. I read 20% of the total number of pages on the first day, and the ratio of the number of pages read on the second day to the number of pages read on the first day was 5:4, leaving 110 pages unread. How many pages are there in total?
小明读一本书．第一天读了总页数的20%，第二天读的页数与第一天读的页数比是5：4，还剩110页没有读．全书一共有多少页？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/5) / 4</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">(1/20) * 5</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/5) - (1/4)</gadget>
<output>11/20 = around 0.55</output>

<gadget id="calculator">110 / (11/20)</gadget>
<output>200</output>

<result>200</result>