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: [63.528, -87.509, -14.482, 48.942, 123.246, 125.343, 176.487, -48.536, 134.705, 104.147]

62.587