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:
[84.091, 17.564, 58.169, 6.482, 53.256, 216.444, 171.489]

Ex Output:
86.785


Ex Input:
[226.287, 114.252, -53.47, 8.606, 234.708, -31.872, 163.615]

Ex Output:
94.589


Ex Input:
[112.771, 219.989]

Ex Output:

166.38