import java.util.Scanner;

public class question5
{
    public static void main(String[] args)
    {
        //Creates Scanner object
        Scanner keyb = new Scanner(System.in);

        //Prompts user for input
        System.out.print("Enter initial amount of Technetium-99: ");
        //Variables are assigned
        double originalAmount = keyb.nextDouble();
        double time = 0;
        double amount = 0;

        //Since time == 0, this loop SHOULD work.
        while(time <= 24);
        {
            //The amount should be calculated
            amount = originalAmount * (Math.pow(Math.E, (((-1)*time)*((Math.log(2))/6))));
            //Answer printed out
            System.out.print("Amount remaining at time " + time + ": " + amount);
            //time variable updated
            time = time + 3;
        }
    }
}