Question: Write a program that reads in investment amount, annual interest rate, and number of years, and displays the future investment value using the following formula:
futureInvestmentValue = investmentAmount * (1 + monthlyInterestRate)^(numberOfYears * 12)

Solution: Note the two possible methods of printing the output.
1) Display result by division method: In Java, if you divide a value with a decimal place, you can obtain an output with a decimal value. This can be used in place of a printf() function.

2) Display result using printf method: The printf() function allow you to format output. It should in the following order: %[flags][width][.precision]conversion-character. You can learn more about Java printf() on Oracle Java docs.

public class futureInvestment {
	public static void main(String[] args) {
		Scanner input = new Scanner(System.in);

		// Prompt the user to enter the investment amount,
		// annual interest rate and number of years.
		System.out.print("Enter investment amount: ");
		double amount = input.nextDouble();
		System.out.print("Enter annual interest rate in percentage: ");
		double monthlyInterestRate = input.nextDouble();
		monthlyInterestRate /= 1200;
		System.out.print("Enter number of years: ");
		int years = input.nextInt();

		// Calculate future investment value
		double futureInvestmentValue = 
			amount * Math.pow(1 + monthlyInterestRate, years * 12);
		
		// 1) Display result by division method
		System.out.println("Future value is $" + (int)(futureInvestmentValue * 100) / 100.0);
		// 2) Display result using printf method
		System.out.printf("Future value is $%.2f", futureInvestmentValue);		
	}
}

I would recommend that you use printf() method and get familiar with the format specifiers.

Output:
For example, if you enter amount 1000, annual interest rate 3.25%, and number of years 1, the future investment value is 1032.98

Enter investment amount: 1000.56
Enter annual interest rate in percentage: 4.25
Enter number of years: 1
Future value is $1043.92