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:
[-61.513, 183.183, 185.709, 179.801, 194.827, 91.62, 229.939, -7.981, 123.813, -77.981]

Ex Output:
104.142


Ex Input:
[85.011, -20.439, 195.195, 114.286]

Ex Output:
93.513


Ex Input:
[195.105, 219.714, 104.566, 163.792, -37.969, 180.779, 86.241, -26.298]

Ex Output:

110.741