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:
[199.153, 182.13, -7.832, -60.259]

Ex Output:
78.298


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

Ex Output:
94.961


Ex Input:
[205.331, 212.917, 143.657, 235.033, -83.9, 54.057, 88.002, 20.22]

Ex Output:

109.415