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: [-51.824, 233.986, 91.275, 213.589, 188.414, -4.454, -32.815, 157.482]

99.457