Challenge - Java program that reads in investment amount, annual interest rate, and number of years, and displays the future investment value

Program

import java.util.Scanner;
import java.text.DecimalFormat;
import java.lang.*;
public class problem1 {
    public static void main(String args[]) {
        //taking inputs from user
        Scanner sc=new Scanner(System.in);
        System.out.println("Enter investment amount: ");
        double i=sc.nextDouble(); 
        System.out.println("Enter annual interest reate: ");
        double a=sc.nextDouble(); 
        System.out.println("Enter number of years: ");
        double n=sc.nextDouble(); 
        //defining DecimalFormat to round off result to 2 decimals
        DecimalFormat twoDForm = new DecimalFormat("#.##");
        //Displaying the result
        System.out.println("Accumulated value is "+Double.valueOf(twoDForm.format(i*Math.pow(1+(a/1200),n*12))));
    }
}