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

[70.485, 231.704, -98.046, -30.011, 80.665, 168.282, 224.41]
92.498

[4.225, 101.629, 62.852]

56.235

