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:
[138.602, 158.458, 241.327, 194.509, 169.45, -56.151]

Ex Output:
141.032


Ex Input:
[65.486, -51.995, 170.628, -23.998, 83.128, -57.38, 130.737, 214.738]

Ex Output:
66.418


Ex Input:
[124.705, 156.599]

Ex Output:

140.652