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.

[-64.231, 200.235, -9.547, -98.817, 222.577, 12.8, 214.705, 122.883, 216.246, 113.126]
92.998

[196.683, 97.538, 247.799, 203.036, 203.369, -15.737]
155.448

[137.463, -53.647, -83.336, -17.873, 135.3, 138.149, 198.283, -74.7]

47.455