What is the average of the five numbers 136,138,140,142,144?
136,138,140,142,144这五个数的平均数是多少．
<gadget id="calculator">136 + 138 + 140 + 142 + 144</gadget>
<output>700</output>

<gadget id="calculator">700 / 5</gadget>
<output>140</output>

<result>140</result>