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:
[202.724, 129.438, -75.21, 114.102, 151.266]

Ex Output:
104.464


Ex Input:
[12.155, 204.528, 85.84, 66.186]

Ex Output:
92.177


Ex Input:
[98.45, 78.568]

Ex Output:

88.509