Liu Ying reads a book. She reads 25 pages on the first day and 30 pages on the second day. She happened to read this book in two days (5/11). How many pages does this book have in total? (List equations to solve)
刘颖看一本书，第一天看了25页，第二天看了30页，两天正好看了这本书的(5/11)，这本书总共有多少页？(列方程来解答)
<gadget id="calculator">25 + 30</gadget>
<output>55</output>

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

<gadget id="calculator">55 / (5/11)</gadget>
<output>121</output>

<result>121</result>