Definition: 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.
Input: [179.564, 198.167, 2.973, 10.858, 198.17, -30.731, -77.551, -23.097]

57.294