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:
[38.24, 196.576, -84.173, -45.001, 1.607, 170.177, 234.811, -60.183, -91.513]

Ex Output:
40.06


Ex Input:
[114.041, 53.494, 14.751, -0.392, -70.081, 116.8, 1.044, -50.731]

Ex Output:
22.366


Ex Input:
[-12.668, -49.351, -74.155]

Ex Output:

-45.391