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.

[198.323, 108.702, 38.704, -8.85, 57.749, 108.604, -20.56, 229.826, -85.953, 177.128]
80.367

[-40.509, 201.39]
80.44

[140.249, 34.526, 18.603, -30.895, 217.753, 95.574, -31.568, -38.575, 220.01]

69.52