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:
[227.404, 94.456, 233.241, 147.762, -31.667, -62.22, -93.912]

Ex Output:
73.581


Ex Input:
[94.752, 94.081, 191.426]

Ex Output:
126.753


Ex Input:
[85.56, 37.294, 175.475, 15.73]

Ex Output:

78.515