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:
[-61.905, -98.66, 90.472, 237.317, 5.243, 196.933]

Ex Output:
61.567


Ex Input:
[49.035, -81.115, 27.419]

Ex Output:
-1.554


Ex Input:
[155.541, 20.747, 215.072, 174.183, 247.226]

Ex Output:

162.554