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:
[85.354, -22.629, 51.171, 238.376, 177.126, -90.135, -84.086, 175.426, -80.74]

Ex Output:
49.985


Ex Input:
[-71.745, -18.239, 214.837, -22.915, 180.841, -4.641]

Ex Output:
46.356


Ex Input:
[247.904, 133.901]

Ex Output:

190.902