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:
[95.472, 109.291, 245.955, 86.122, -90.639, 144.544, 31.063, 89.001, 40.671]

Ex Output:
83.498


Ex Input:
[15.293, 221.056, 241.387, 81.3, 102.644, 146.885, -33.65, -36.56, -69.176]

Ex Output:
74.353


Ex Input:
[141.554, 211.997, 146.939, 123.283, -58.205]

Ex Output:

113.114


