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:
[54.908, 25.798]

Ex Output:
40.353


Ex Input:
[84.13, 59.186, 115.606]

Ex Output:
86.307


Ex Input:
[32.661, 99.26, 20.595, -64.167, 28.87, 196.285, 162.102]

Ex Output:

67.944