When Zhang Li reads a story book, she has already read 78 pages, which is 12 pages more than twice the one she has not read. How many pages are there in total?
张丽看一本故事书，已经看了78页，比没看的2倍多12页，这本书一共多少页？
<gadget id="calculator">78 - 12</gadget>
<output>66</output>

<gadget id="calculator">66 / 2</gadget>
<output>33</output>

<gadget id="calculator">33 + 78</gadget>
<output>111</output>

<result>111</result>