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: [118.695, 126.393, 20.738, 213.816, 38.327, 177.717, -80.534, -24.012, 245.774, 58.344]

89.526