There are 138 people in the third grade to visit the Science and Technology Museum, and they are divided into 2 teams on average. Each team is divided into 3 groups on average. How many people are there in each group?
三年级有138人去参观科技馆，平均分成2队，每队平均分成3个小组，每个小组有多少人．
<gadget id="calculator">138 / 2 / 3</gadget>
<output>23</output>

<result>23</result>