The meteorological team measured the highest temperature for each day of the week as follows: 28°C, 30°C, 32°C, 31°C, 28°C, 31°C, 30°C. What is the average maximum temperature this week?
气象小组测得一周中每天的最高气温如下：28℃、30℃、32℃、31℃、28℃、31℃、30℃．这一周平均最高气温是多少摄氏度？
<gadget id="calculator">28 + 30 + 32 + 31 + 28 + 31 + 30</gadget>
<output>210</output>

<gadget id="calculator">210 / 7</gadget>
<output>30</output>

<result>30</result>