In this task you will be given a list of numbers and you need to find the mean (average) of that list. The mean of a list can be found by summing every number in the list then dividing the result by the size of that list. The output should be rounded to 3 decimal places.

Ex Input:
[23.632, 47.911, 95.884, 239.46, -68.225, 80.094, 111.959]

Ex Output:
75.816


Ex Input:
[207.165, 246.399, 44.821, -21.671]

Ex Output:
119.178


Ex Input:
[242.907, -39.291, 161.97]

Ex Output:

121.862


