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:
[120.682, 53.847]

Ex Output:
87.264


Ex Input:
[245.091, 201.984, 204.428, 222.046, 4.807, 21.497, -34.025, 160.097]

Ex Output:
128.241


Ex Input:
[222.198, -91.259, -78.475, 220.593, -58.21, -63.051, 77.786, 168.183]

Ex Output:

49.721