The three children Xiaohong, Xiaoqing and Xiaolan skip the rope in one minute at the same time as follows, 126, 135, and 141 times. The average number of rope skipping per minute for each of the three children is as follows.
小红、小青和小兰三个小朋友同时一分钟跳绳个数如下，126下、135下、141下，他们3个小朋友平均每人一分钟跳绳多少下．
<gadget id="calculator">126 + 135 + 141</gadget>
<output>402</output>

<gadget id="calculator">402 / 3</gadget>
<output>134</output>

<result>134</result>