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: [-27.115, -11.908, 125.703, 202.749, 139.333, 242.982, -93.292, 161.484]

92.492