A storybook reads 16 pages every day for 5 days, and there are 9 pages left. How many pages are there in this storybook?
一本故事书每天看16页，看了5天，还剩9页，这本故事书共多少页．
<gadget id="calculator">16 * 5</gadget>
<output>80</output>

<gadget id="calculator">80 + 9</gadget>
<output>89</output>

<result>89</result>