The third grade girls are going to perform a group dance performance. The teacher divides the 120 people participating in the performance into 2 teams on average. Each team is divided into 4 groups on average. How many people are there in each group?
三年级女生要进行集体舞表演，老师将参加表演的120人平均分成2队，每队平均分成4组，每组有多少人？
<gadget id="calculator">120 / 2 / 4</gadget>
<output>15</output>

<result>15</result>