The heights of the students in the second group of the third grade are 147 cm, 142 cm, 148 cm, 140 cm, 138 cm, and 137 cm. What is the average height of the students in the second group?
三年级第二小组同学的身高分别是147厘米、142厘米、148厘米、140厘米、138厘米、137厘米．第二小组同学的平均身高是多少？
<gadget id="calculator">147 + 142 + 148 + 140 + 138 + 137</gadget>
<output>852</output>

<gadget id="calculator">852 / 6</gadget>
<output>142</output>

<result>142</result>