The number of times Xiaoming skipped rope three times was 69, 73, and 68 respectively. What is his average score?
小明三次跳绳的次数分别是69下，73下，68下，他的平均成绩是多少下．
<gadget id="calculator">69 + 73 + 68</gadget>
<output>210</output>

<gadget id="calculator">210 / 3</gadget>
<output>70</output>

<result>70</result>