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:
[213.2, 159.287, 214.859, 189.464, 185.706, -85.847, 215.647, 8.545]

Ex Output:
137.608


Ex Input:
[162.434, 99.656, 86.665, 13.03, 99.225, 43.608, -41.822, 206.671]

Ex Output:
83.683


Ex Input:
[10.216, 113.588, 134.786, 101.737, 147.605, 234.905, -97.513, -15.72]

Ex Output:

78.7