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:
[145.697, -40.957, -46.926, -55.065, 177.211, 204.811, -94.192, -47.466]

Ex Output:
30.389

Ex Input:
[233.84, -38.337, 10.341, 195.901, 68.586, 214.429, 213.823, 88.799]

Ex Output:
123.423

Ex Input:
[208.015, -87.163, -91.175, 148.043, 222.065, 171.829, -64.682, -6.178, -27.617, -86.023]

Ex Output:
38.711