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

Ex Output:
66.418


Ex Input:
[58.271, 233.766, -9.758, -40.349, 145.507, 90.294, 186.999]

Ex Output:
94.961


Ex Input:
[150.089, 204.642, 112.387, 222.318]

Ex Output:

172.359