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.

[116.268, 173.27, 228.827, 52.695, 66.445, -34.051, 152.137]
107.942

[197.424, 44.178, 136.316, 246.48, 98.472, -31.327, 41.411]
104.708

[216.883, -37.346, 67.498, 41.686, 140.857, 195.57]

104.191