import java.util.*;
import java.text.*;
class FutureInvestmentRate 
{
    public static void main(String[] args) 
    {
        DecimalFormat df=new DecimalFormat("##.##");
        Scanner input=new Scanner(System.in);
        System.out.print("Enter investment amount: ");
        double amount=input.nextDouble();

        System.out.print("Enter monthly interest rate: ");
        double rate=input.nextDouble();

        System.out.print("Enter number of years: ");
        int years=input.nextInt();
double v1=1+rate;
double v2=v1*years*12;
double futureInvestmentvalue = amount * v2;
System.out.println(df.format(futureInvestmentvalue));

    }
}