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.

[237.861, 119.858, -8.107, -30.075, 180.524]
100.012

[-27.115, -11.908, 125.703, 202.749, 139.333, 242.982, -93.292, 161.484]
92.492

[-92.768, 198.533, 38.737, -64.238, 136.357, 10.586]
37.868