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:
[213.149, 184.894, -93.544, 195.043, 78.738, 229.09, 220.609, 80.079, 7.498]

Ex Output:
123.951


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