The two students went to water the trees. Xiaojun said: "I water the 4 rows here." Xiaohong said: "I water the 4 rows here." The two of them watered a total of 176 trees. How many trees are there on average in each row?
两位同学去浇树．小军说："我浇这边的4行．"小红说："我浇这边的4行．"两人一共浇了176棵树，平均每行有多少棵？
<gadget id="calculator">4 + 4</gadget>
<output>8</output>

<gadget id="calculator">176 / 8</gadget>
<output>22</output>

<result>22</result>