Xiaojun read a book, 18 pages on the first day, 1/8 of the book on the second day, and 45 pages left. How many pages are there in this storybook?
小军看了一本书，第一天看了18页，第二天看了全书的(1/8)，还剩下45页没有看，这本故事书有多少页？
<gadget id="calculator">7 / 8</gadget>
<output>7/8 = around 0.875</output>

<gadget id="calculator">63 / (7/8)</gadget>
<output>72</output>

<result>72</result>