Students from the school meteorological team recorded the highest temperatures of each day in a week as follows: 29°C, 32°C, 33°C, 29°C, 30°C, 29°C, 28°C. What is the average maximum temperature in degrees Celsius this week?
学校气象小组同学记录了某一周各天的最高气温分别是：29℃、32℃、33℃、29℃、30℃、29℃、28℃．这一周的平均最高气温是多少摄氏度？
<gadget id="calculator">29 + 32 + 33 + 29 + 30 + 29 + 28</gadget>
<output>210</output>

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

<result>30</result>