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: [-1.02, 165.738, 99.558, 238.915, -65.543, -80.467, -67.754, 176.817, 232.902, 37.136]

73.628