The meteorological team measured the temperature at 2:00, 8:00, 14:00, and 20:00 on a certain day, and the measured temperatures were 13°C, 16°C, 25°C, and 18"C. What is the average temperature for this day?
气象小组在某一天的2时、8时、14时、20时进行测温，测得的温度分别是13℃、16℃、25℃、18"C．这一天的平均温度是多少？
<gadget id="calculator">13 + 16 + 25 + 18</gadget>
<output>72</output>

<gadget id="calculator">72 / 4</gadget>
<output>18</output>

<result>18</result>