using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Enter principle");

        double a = Double.Parse(Console.ReadLine());

        Console.WriteLine("Enter rate of interest");

        double b = Double.Parse(Console.ReadLine());

        Console.WriteLine("Enter time period");

        int c = Int32.Parse(Console.ReadLine());

        double SI = a * b * c / 100.0;

        Console.WriteLine("Calculated Simple Interest Rs " + SI + ".");

    }

}

​