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: [-74.261, 181.495, -10.599, -58.346, -91.272, 83.835, 196.377, 32.455, 130.409, 213.129]

60.322