using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine(CustomCeiling(233,2));

        Console.WriteLine(CustomCeiling(233,3));

        Console.WriteLine(CustomCeiling(233,4));

        Console.WriteLine(CustomCeiling(233,5));

        Console.WriteLine(CustomCeiling(233,6));

        Console.WriteLine(CustomCeiling(233,7));

        Console.WriteLine(CustomCeiling(233,8));

        Console.WriteLine(CustomCeiling(233,9));

        Console.WriteLine(CustomCeiling(233,10));

        Console.WriteLine(CustomCeiling(233,15));

        Console.WriteLine(CustomCeiling(233,30));

        Console.WriteLine(CustomCeiling(233,50));

        Console.WriteLine(CustomCeiling(233,90));

    }

    public static int CustomCeiling(int value, int factor)

    {

        if (factor <= 0)

            throw new ArgumentException("Factor must be greater than zero.", nameof(factor));

​

        return (int)(Math.Ceiling((double)value / factor) * factor);

    }

}