The heights of the four students are 136 cm, 132 cm, 128 cm and 124 cm respectively. What is their average height?
四个同学的身高分别为136厘米、132厘米、128厘米、124厘米．求他们的平均身高是多少？
<gadget id="calculator">136 + 132 + 128 + 124</gadget>
<output>520</output>

<gadget id="calculator">520 / 4</gadget>
<output>130</output>

<result>130</result>