The third grade students participated in the tree planting activity. There were 128 boys and 112 girls. Every 4 students planted a tree. How many trees did the third grade plant in total?
三年级学生参加植树活动，男生有128人，女生有112人，毎4人植一棵树，三年级一共植了多少棵树？
<gadget id="calculator">128 + 112</gadget>
<output>240</output>

<gadget id="calculator">240 / 4</gadget>
<output>60</output>

<result>60</result>