input: Write a python function to find the Least Common Multiple (LCM) of two numbers.
  assert compute_lcm(15, 10) == 30
  assert compute_lcm(21, 6) == 42
  assert compute_lcm(8, 12) == 24
output: def compute_lcm(x, y):
      def gcd(a, b):
          while b:
              a, b = b, a % b
          return a
      
      return abs(x * y) // gcd(x, y)