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

Ex Output:
58.328


Ex Input:
[-86.423, 157.154, 69.563, -67.516, 147.66, 216.018, 213.404]

Ex Output:
92.837


Ex Input:
[-78.769, 191.064, -17.588, 148.438, 64.931]

Ex Output:

61.615