The third grade students of Foreign Language Experimental Primary School participated in the tree watering activity, 7 classes watered 644 trees in total. How many trees are watered per shift on average?
外国语实验小学三年级学生参加浇树活动，7个班一共浇了644棵树．平均每个班浇多少棵树？
<gadget id="calculator">644 / 7</gadget>
<output>92</output>

<result>92</result>