The third grade has four classes, the first class has 45 students, the second class has 48 students, the third class has 43 students, and the fourth class has 40 students, what is the average number of students in each class?
三年级有四个班，一班有45人，二班有48人，三班有43人，四班有40人，平均每个班有多少人．
<gadget id="calculator">45 + 48 + 43 + 40</gadget>
<output>176</output>

<gadget id="calculator">176 / 4</gadget>
<output>44</output>

<result>44</result>