Wang Qiang of the mathematics interest group is 138 cm tall, Li Ming is 132 cm tall, Zhao Lei is 129 cm tall, Ma Xiaofei is 131 cm tall, and Liu Si is 120 cm tall. What is the average height in centimeters of this interest group?
数学兴趣小组的王强身高是138厘米，李明身高是132厘米，赵蕾身高是129厘米，马小飞身高是131厘米，刘思身高是120厘米．这个兴趣小组的平均身高是多少厘米？
<gadget id="calculator">138 + 132 + 129 + 131 + 120</gadget>
<output>650</output>

<gadget id="calculator">650 / 5</gadget>
<output>130</output>

<result>130</result>