Solution Review: Big (O) of Nested Loop with Addition

namespace Chapter_1
{
    class Challenge_1
    {
        static void Main(string[] args)
        {
            int n = 10;
            int sum = 0;
            float pie = 3.14F;
            for (int i = 0; i < n; i += 3) // O(n/3)
            {  
                Console.WriteLine(pie);        // O(n/3)
                for (int j = 0; j < n; j += 2) // O((n/3)*(n/2))
                {    
                    sum += 1;        // O((n/3)*(n/2))
                    Console.WriteLine(sum);   // O((n/3)*(n/2))
                }
            }
        }
    }
}