Xiaohong reads a book. After two days, there are still two fifths of the book left. It is known that Xiaohong read 30 pages on the first day, and the ratio of the number of pages read on the second day is 5:6. Find the total number of pages in this book. How many pages are there?
小红看一本书，两天后，还剩全书的五分之二，已知小红第一天看了30页，与第二天看的页数比是5：6，求这本书一共有多少页？
<gadget id="calculator">30 * 6</gadget>
<output>180</output>

<gadget id="calculator">180 / 5</gadget>
<output>36</output>

<gadget id="calculator">30 + 36</gadget>
<output>66</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">66 / (3/5)</gadget>
<output>110</output>

<result>110</result>