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: [206.692, -93.264, -95.685, 63.499, -46.015, 174.115, 136.415]

49.394