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.

[140.332, 92.06]
116.196

[-56.201, -77.67, -75.53, -51.92, 146.416, 141.525]
4.437

[178.052, 84.535, 239.018, -46.646, 209.211, 111.926, 118.579]

127.811