A story book, I read 5 pages a day for 7 days, and there are 65 pages left, how many pages are there in this book?
一本故事书，我每天看5页，看了7天，还剩65页，这本书有多少页？
<gadget id="calculator">5 * 7</gadget>
<output>35</output>

<gadget id="calculator">35 + 65</gadget>
<output>100</output>

<result>100</result>