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.

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

[-60.041, -56.779, 6.2, 73.114, 137.319]
19.963

[68.802, 203.777, 102.066, -14.825, -20.498, 173.24, 201.599]

102.023