There are three children whose heights are 146 cm, 144 cm and 151 cm respectively. What is the average height of these three children in cm?
有三个小朋友身高分别高146厘米、144厘米和151厘米，这三个小朋友的平均身高是多少厘米？
<gadget id="calculator">146 + 144 + 151</gadget>
<output>441</output>

<gadget id="calculator">441 / 3</gadget>
<output>147</output>

<result>147</result>