A meteorological team measures 18°C, 20°C, 28°C and 26°C respectively at 2:00, 8:00, 16:00 and 20:00 in a day. Find the average temperature of the day.
某气象小组在一天中的2时、8时、16时和20时分别测得气温是18度，20度，28度和26度，求这一天的平均气温．
<gadget id="calculator">18 + 20 + 28 + 26</gadget>
<output>92</output>

<gadget id="calculator">92 / 4</gadget>
<output>23</output>

<result>23</result>