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: [182.258, -29.431, 183.159, 213.025, -52.846, 107.38, 57.19]

94.391