Xiao Ming reads a book and reads 20% of the total pages on the first day. The ratio of the number of pages read on the second day to the number of pages read on the first day is 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">5 / 4</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">(1/5) * (5/4)</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>