Xiaohong reads a book. She reads 16 pages on the first day and 42 pages on the second day. At this time, the ratio of the number of pages she has read to the number of pages she has not read is 2:3. How many pages does this book have?
小红看一本书，第一天看了16页，第二天看42页，这时已看的与未看的页数之比是2：3．这本书共有多少页？
<gadget id="calculator">16 + 42</gadget>
<output>58</output>

<gadget id="calculator">2 + 3</gadget>
<output>5</output>

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

<gadget id="calculator">58 / (2/5)</gadget>
<output>145</output>

<result>145</result>