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: [49.033, -66.952, 1.309, -1.053, 182.461, 144.872, -53.64]

36.576