Yangyang read an extra-curricular book, and read 120 pages in the first 8 days. At this speed, Yangyang spent another 7 days to finish reading the book. How many pages does the book have?
洋洋看一本课外书，前8天看了120页，照这样的速度，洋洋又用了7天把这本书全部看完，这本书一共有多少页？
<gadget id="calculator">120 / 8</gadget>
<output>15</output>

<gadget id="calculator">8 + 7</gadget>
<output>15</output>

<gadget id="calculator">15 * 15</gadget>
<output>225</output>

<result>225</result>