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: [232.415, 41.128, -57.726, 85.509, 193.599, 193.053, 170.655, 214.266, 3.58, 118.394]

119.487