The meteorological team measured the temperature at 12 noon every day of the week: 28°C, 32°C, 31°C, 31°C, 29°C, 28°C, 31°C. What is the average temperature in this week?
气象小组测得一周中每天中午12时气温分别是：28°C、32°C、31°C、31°C、29°C、28°C、31°C这一周的平均气温是多少摄氏度？
<gadget id="calculator">28 + 32 + 31 + 31 + 29 + 28 + 31</gadget>
<output>210</output>

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

<result>30</result>