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: [26.527, 232.13, -18.473, 181.37, -41.239, -76.629, 148.596]

64.612