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:
[234.404, 162.933, 178.375, 10.683, 181.727, -50.587, 169.507, -72.896, 168.06, 238.363]

Ex Output:
122.057


Ex Input:
[2.81, 52.99, 55.279, 75.682, 73.835, 148.077, -54.162, 112.112]

Ex Output:
58.328


Ex Input:
[243.793, 58.654, 149.721]

Ex Output:

150.723