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: [190.161, 195.476, -94.868, 118.668, -0.53, -61.893, -87.706, 203.952]

57.908