Little Ding Ding reads a story book. On the first day, he reads half of the book and more than 6 pages. On the second day, he reads the remaining half and more than 5 pages. There are still 13 pages that he has not read. How many pages does this storybook have?
小丁丁看一本故事书，第一天看了这本书的一半多6页，第二天看了余下的一半多5页，还有13页没有看．这本故事书共有多少页？
<gadget id="calculator">13 + 5</gadget>
<output>18</output>

<gadget id="calculator">18 * 2</gadget>
<output>36</output>

<gadget id="calculator">36 + 6</gadget>
<output>42</output>

<gadget id="calculator">42 * 2</gadget>
<output>84</output>

<result>84</result>