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:
[-69.698, 181.415, -43.045, 160.857]

Ex Output:
57.382


Ex Input:
[-41.362, 123.84, 236.661, -43.042, 53.399, 15.001, 10.159, 38.886, 74.298, 167.559]

Ex Output:
63.54


Ex Input:
[236.945, 167.818, 25.117, 231.624]

Ex Output:

165.376