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:
[-4.969, 232.548, 81.586, 13.448, -85.528, -1.661, -76.971]

Ex Output:
22.636


Ex Input:
[77.498, 234.955, 184.005, -48.344, 113.167]

Ex Output:
112.256


Ex Input:
[-92.758, 186.47, 83.239, -95.255, -14.637, 161.829, 112.07, 227.775, -77.176]

Ex Output:

54.617