A book, read 30 pages on the first day, read (1/4) of this book on the second day, and read a total of 65 pages in two days. How many pages does this book have?
一本书，第一天看了30页，第二天看了这本书的(1/4)，两天共看了65页．这本书共有多少页？
<gadget id="calculator">65 - 30</gadget>
<output>35</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">35 / (1/4)</gadget>
<output>140</output>

<result>140</result>