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:
[89.226, 241.396, 7.011, 114.867, 113.075, 103.559, 83.142, 188.743, -27.33, 180.773]

Ex Output:
109.446


Ex Input:
[109.74, 169.0, 195.864, -1.043, 51.968, -56.564, 214.711, -78.61, 212.459, 228.74]

Ex Output:
104.626


Ex Input:
[40.841, 43.656, 169.652, 216.532, -15.841, 16.685, -15.805, -91.177, 98.947, -68.002]

Ex Output:

39.549