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.

[217.523, 92.701, -55.65, -89.359, 55.742, 158.634, -31.883, 206.554]
69.283

[-61.563, 49.659, 125.562, 130.542, 75.232, 197.442, 175.182, 54.736, 210.833, 65.27]
102.289

[179.564, 198.167, 2.973, 10.858, 198.17, -30.731, -77.551, -23.097]

57.294