Xiao Ming reads a storybook. He reads 12 pages a day for the first 5 days, and reads 20 pages in the last day. He happens to finish this book. How many pages does this storybook have?
小明看一本故事书，前5天每天看12页，最后一天看了20页，正好看完这本书，这本故事书一共多少页？
<gadget id="calculator">5 * 12</gadget>
<output>60</output>

<gadget id="calculator">60 + 20</gadget>
<output>80</output>

<result>80</result>