The fourth grade students participated in the tree planting, divided 90 people into 2 teams on average, each team was divided into 3 groups on average, how many people are there in each group? (Only the column formula does not count)
四年级同学参加植树，把90人平均分成2队，每队平均分成3组，每组有多少人？(只列式不计算)
<gadget id="calculator">90 / 2 / 3</gadget>
<output>15</output>

<result>15</result>