Xiao Ming reads a book of fairy tales, and has already read 105 pages, and the remaining 18 pages a day, and 20 days to finish. How many pages are there in this book of fairy tales?
小明看一本童话故事书，已经看了105页，剩下的每天看18页，还要看20天看完．这本童话故事书一共多少页？
<gadget id="calculator">18 * 20</gadget>
<output>360</output>

<gadget id="calculator">105 + 360</gadget>
<output>465</output>

<result>465</result>