The first class borrowed 33 books, and the second class borrowed 5 books less than the first class. How many people are there in the two classes?
一班借书33本，二班比一班少5本．两个班一共有多少人？
<gadget id="calculator">33 - 5</gadget>
<output>28</output>

<gadget id="calculator">28 + 33</gadget>
<output>61</output>

<result>61</result>