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:
[-32.557, -70.922, 191.786, 244.222]

Ex Output:
83.132


Ex Input:
[-45.826, -27.376, 126.782, -28.164, 213.819, 186.676]

Ex Output:
70.985


Ex Input:
[154.713, 118.74, 99.073, 95.236, 174.227, 181.785, 124.121, 94.638]

Ex Output:

130.317