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:
[116.074, 213.452, 86.981]

Ex Output:
138.836


Ex Input:
[-48.196, 15.566, 65.782, 174.566, -91.786, 52.379, 2.658, 76.856]

Ex Output:
30.978


Ex Input:
[-47.323, 34.798, 11.658, 61.506, 159.654, -87.945, 89.509, 132.403, 176.143]

Ex Output:

58.934