Xiao Ming reads a book. On the first day, he read half of the book, more than 13 pages, and there are 140 pages left to finish reading the next day. How many pages does this book have?
小明看一本书，第一天看了这本书的一半多13页，还剩140页准备第二天看完．这本书一共有多少页？
<gadget id="calculator">140 + 13</gadget>
<output>153</output>

<gadget id="calculator">153 * 2</gadget>
<output>306</output>

<result>306</result>