Xiao Ming reads a story book, and it has 33 pages, which is 12 pages less than the rest. How many pages does this book have?
小明看一本故事书，已看来33页，比剩下的少12页，这本书由多少页？
<gadget id="calculator">33 + 12 + 33</gadget>
<output>78</output>

<result>78</result>