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:
[-47.309, -46.076, 191.14, -6.032, 4.858]

Ex Output:
19.316


Ex Input:
[243.697, 165.796, 114.518, 207.298, 191.227]

Ex Output:
184.507


Ex Input:
[138.55, 148.997]

Ex Output:

143.774