A school is divided into 4 groups to do good deeds for the nursing home, 25 deeds in the first week, 30 deeds in the second week, 29 deeds in the third week, how many deeds are done on average per week? What is the correct column
某校分4组为敬老院做好事，第一星期做25件，第二星期做30件，第三星期做29件，平均每星期做多少件？列式正确的是多少
<gadget id="calculator">25 + 30 + 29</gadget>
<output>84</output>

<gadget id="calculator">84 / 3</gadget>
<output>28</output>

<result>28</result>