How do I return an input to another class?

private static void Dieselfuel(double fuel) throws FileNotFoundException { // TODO Auto-generated method stub

    scan2 = new Scanner(System.in);
    
    double integer1;
    double sum;
    
    
    DecimalFormat df = new DecimalFormat("###.#");
    integer1 = 1.30;
    sum = integer1 * fuel;

    

So this is the receipt to show the user how much he/she entered the requested amount of fuel.

    LocalDateTime myDateObj = LocalDateTime.now();
     DateTimeFormatter myFormatObj = DateTimeFormatter.ofPattern("dd-MM-yyyy HH:mm:ss");
     String formattedDate = myDateObj.format(myFormatObj);
     System.out.println("");
     System.out.println("                                 RECEIPT");
     System.out.println("JLT's Garage "+"                    DATE: " + formattedDate);
     System.out.println("__________________________________________________________");
     System.out.println("|   Item Description  |   Amount (per/litre)  |   Price   |"); 
     System.out.println("|‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾|‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾|‾‾‾‾‾‾‾‾‾‾‾|");
     System.out.println("|    Diesel fuel      |"+"          " + fuel +"         |" + "   £" + df.format(sum) + "   |");
     System.out.println("|_____________________|_______________________|___________| ");
     System.out.println("                                        Total cost: £ " + df.format(sum));
     System.out.println("Thanks for using our service (: ");
     System.out.println("");
    
    
    return;

}
    



public static void Unleaded(String c, double fuel) throws FileNotFoundException {
    // TODO Auto-generated method stub

    scan2 = new Scanner(System.in);
            

                {
                   // initialization expression 
                    int i = 1; 
              
                    // test expression 
                    while (i < 111111) { 
                        System.out.println("----- Standby -----"); 
              
                        // update expression 
                        i++; 
                    } 
                } 
        
                
        {
               // initialization expression 
                int i2 = 1; 
          
                // test expression 
                while (i2 < 70000) { 
                    System.out.println("-----  Ready  -----"); 
          
                    // update expression 
                    i2++; 
                } 
            } 
        
        System.out.println("");                       
        System.out.println("|‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾|");
        System.out.println("|     JLT's Garage      |");
        System.out.println("| The avaliable pumps;  |");
        System.out.println("|_______________________|");
        System.out.println("| 01  |   In use        |");
        System.out.println("| 02  |   Idle          |");
        System.out.println("| 03  |   Idle          |");
        System.out.println("| 04  |   Idle          |");
        System.out.println("| 05  |   Idle          |");                
        System.out.println("| 06  |   Idle          |");
        System.out.println("| 07  |   Idle          |");
        System.out.println("| 08  |   Idle          |");
        System.out.println("| 09  |   Idle          |");
        System.out.println("| 10  |   Idle          |");
        System.out.println("‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾");
        
        {
            
            System.out.println("");
        System.out.println("The cost for V-Power Petrol per litre is currently £1.27 - Please eneter the amount of litre you need");
         
   

   **fuel = input.nextDouble();**

**// I need to print this users value to print out in Dieselfuel class. It's like an receipt transaction to allow him/she to access the receipt again.

           {
           // initialization expression 
            int i3 = 1; 
      
            // test expression 
            while (i3 < 90000) { 
                System.out.println("----- Standby -----"); 
                System.out.println();
      
                // update expression 
                i3++; 
            } 
        } 
    
        
        System.out.println("Ok, here is your fuel; " + fuel + " litre");
    {
        
        System.out.println("Would you still ike to continue with this transaction, yes or no?");
        c = input.next();
        

           {
           // initialization expression 
            int i3 = 1; 
      
            // test expression 
            while (i3 < 90000) { 
                System.out.println("----- Idle -----"); 
      
                // update expression 
                i3++; 
            }
        
        
    {
        if(c.equalsIgnoreCase("y") || c.equalsIgnoreCase("yes")) 
    { 
            
            
            
            Unleadedfuel(fuel);
      
      
            return; 
   
    } else {    
            if(c.equalsIgnoreCase("n") || c.equalsIgnoreCase("no"))
            { 
                System.out.println("");
            System.out.println("Thank you, for using our service.");
            System.out.println("");
         return; 
         }
       
                  }
              }
            }
          }
        }
           }