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:
[26.145, -44.254, 127.581, 162.122, 82.003, 143.809, 96.47, 34.362, 71.469]

Ex Output:
77.745


Ex Input:
[-86.423, 157.154, 69.563, -67.516, 147.66, 216.018, 213.404]

Ex Output:
92.837


Ex Input:
[83.591, 73.404, 81.734, -90.174, -5.429, 172.074, -47.713, 211.829, 232.468, 188.917]

Ex Output:

90.07