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:
[135.962, 136.509, 77.88, 148.448]

Ex Output:
124.7


Ex Input:
[160.713, 125.985, 186.982, -94.178, 183.77]

Ex Output:
112.654


Ex Input:
[200.982, 179.659, 46.905, 146.598, 233.391, 0.725, 132.239, 12.274, 207.432, 216.78]

Ex Output:

137.698