The school distributes a batch of books to 4 classes of the third grade, each class has 9 books, and there are still 2 books left. How many books are there in total?
学校把一批图书分给三年级4个班，每班9本，还差2本，这批图书一共多少本？
<gadget id="calculator">9 * 4</gadget>
<output>36</output>

<gadget id="calculator">36 - 2</gadget>
<output>34</output>

<result>34</result>