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: [11.081, 186.803, 118.394, -26.374, -99.335, 168.539, 46.995]

58.015