Xiao Ming reads 86 pages a day for the first 5 days of reading a book, and reads 79 pages on the 6th day and finishes it. How many pages does this book have?
小明看一本书前5天每天看86页，第6天看了79页正好看完，这本书有几页？
<gadget id="calculator">86 * 5</gadget>
<output>430</output>

<gadget id="calculator">430 + 79</gadget>
<output>509</output>

<result>509</result>