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: [-24.715, 212.353, 112.728, 199.732, 245.806, 194.54, 98.658, 249.16, 225.633, -58.661]

145.523