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.

[223.951, 2.518, 140.336, -38.799, 217.497, 212.153, 21.874]
111.361

[157.14, 120.799, -55.651, -50.479, 89.067, 192.279, 57.227, 137.972]
81.044

[-13.257, 146.496, -29.243, 127.931]

57.982