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:
[-51.603, 117.351, -67.451, 218.664, 68.981, 167.005, -53.851, 104.996]

Ex Output:
63.012


Ex Input:
[-28.982, -63.182, 22.408, 30.425, 125.743, 16.816, 96.711, 215.027, 32.552]

Ex Output:
49.724


Ex Input:
[99.113, 106.04, -22.198]

Ex Output:

60.985