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:
[-46.113, 125.487, 133.801, 230.957, 217.606, 147.203, -27.73, 66.455, -96.494]

Ex Output:
83.464


Ex Input:
[41.573, 107.077, 26.564, -66.491, -90.163, 199.995, -28.782]

Ex Output:
27.11


Ex Input:
[73.596, 210.962, 220.847, -88.376, 6.887, 57.473, 141.324]

Ex Output:

88.959