input: Write a function to find the median of a list of numbers.
  assert get_median([1, 4, 6, 12, 24, 36]) == 9.0
  assert get_median([1, 3, 3, 6, 7, 8, 9]) == 6
  assert get_median([2, 4, 6, 8, 10]) == 6
output: def get_median(numbers):
      numbers.sort()
      n = len(numbers)
      if n % 2 == 0:
          median = (numbers[n // 2 - 1] + numbers[n // 2]) / 2
      else:
          median = numbers[n // 2]
      return median