Need help calculating the amount of time spent traveling

Question

I am having trouble calculating the time spent traveling. I attached some images one is what I'm trying to get and the other is what I am getting. I find it difficult to calculate the time because of the change of speed. Is there any recommendations of how i should go about calculating the estimated time traveled.

public class YourCarProblem {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        Scanner input = new Scanner( System.in );
        int cont;
        int gas = 0;
        double miles=0;
        int mph=0;
        int counter = 1;
        int con = 0;
        int total=0;
        int totalmph=0;
        double time=0;
               
        System.out.print("Are you going on a trip(1=yes or 0=no)?: ");
        cont = input.nextInt();        
        
        if (cont==1) {
            System.out.print("How many gallons of gas in you tank(Integer 1-20):");
            gas = input.nextInt();
            gas+=gas;

            System.out.print("Enter leg distance(Miles)");
            miles=input.nextDouble();
            total+=miles;

            System.out.print("Enter leg 1 speed(MPH)");
            mph=input.nextInt();
            totalmph+=mph;
            
            System.out.print("Is there another leg to your trip(1=yes or 0=no)");
            con=input.nextInt();
            counter++;
        }
        else {
            System.out.println("Thank you have a good day"); 
        }
        
            
        while(con>0) {
            if (con==1) {
                System.out.printf("Enter leg %d distance(Miles): ",counter);
                miles=input.nextDouble();
                total+=miles;
             
             
                System.out.printf("Enter leg %d Speed(MPH): ",counter);
                mph=input.nextInt();
                counter++;
                System.out.print("Is there another leg to your trip(1=yes or 0=no)");
                con=input.nextInt();
             }
             else if(con==0) {
                 System.out.print("have a good day");
             }
          
        }
        time = total/mph;
      
        System.out.printf("You traveled about %d miles in about %f",total,time);
    }
}

Expected output

Actual output