import java.util.Scanner;
public class MyProgram
{
    public static void main(String[] args)
    {
        Scanner input = new Scanner(System.in);
        System.out.println("Enter a number:");
        double num1 = input.nextDouble();

        Scanner oper = new Scanner(System.in);
        System.out.println("Enter an operation (+,-,*,/):");
        String operation = oper.nextLine();

        Scanner input2 = new Scanner(System.in);
        System.out.println("Enter another number:");
        double num2 = input2.nextDouble();

        Scanner oper2 = new Scanner(System.in);
        System.out.println("Enter another operation. If there are no more steps, leave this blank and press Enter.");
        String operation2 = oper2.nextLine();

        if(operation2.equals("")) {
            if(operation.equals("+")) {
                System.out.println(num1 + " + " + num2 + " = " + (num1 + num2));
            }
            else if(operation.equals("-")) {
                System.out.println(num1 + " - " + num2 + " = " + (num1 - num2));
            }
            else if(operation.equals("/")) {
                System.out.println(num1 + " / " + num2 + " = " + (num1 / num2));
            }
            else if(operation.equals("*")) {
                System.out.println(num1 + " * " + num2 + " = " + (num1 * num2));
            }
        } else {
          Scanner input3 = new Scanner(System.in);
          System.out.println("Enter another number:");
          double num3 = input3.nextDouble();

          if(operation.equals("+")) {
              if(operation2.equals("+")) {
                  System.out.println(num1 + " + " + num2 + " + " + num3 + " = " + (num1 + num2 + num3));
              } else if(operation2.equals("-")) {
                  System.out.println(num1 + " + " + num2 + " - " + num3 + " = " + (num1 + num2 - num3));
              } else if(operation2.equals("*")) {
                  System.out.println(num1 + " + " + num2 + " * " + num3 + " = " + (num1 + num2 * num3));
              } else if(operation2.equals("/")) {
                  System.out.println(num1 + " + " + num2 + " / " + num3 + " = " + (num1 + num2 / num3));
              }
          } else if(operation.equals("-")) {
              if(operation2.equals("+")) {
                  System.out.println(num1 + " - " + num2 + " + " + num3 + " = " + (num1 - num2 + num3));
              } else if(operation2.equals("-")) {
                  System.out.println(num1 + " - " + num2 + " - " + num3 + " = " + (num1 - num2 - num3));
              } else if(operation2.equals("*")) {
                  System.out.println(num1 + " - " + num2 + " * " + num3 + " = " + (num1 - num2 * num3));
              } else if(operation2.equals("/")) {
                  System.out.println(num1 + " - " + num2 + " / " + num3 + " = " + (num1 - num2 / num3));
              }
          } else if(operation.equals("*")) {
              if(operation2.equals("+")) {
                  System.out.println(num1 + " * " + num2 + " + " + num3 + " = " + (num1 * num2 + num3));
              } else if(operation2.equals("-")) {
                  System.out.println(num1 + " * " + num2 + " - " + num3 + " = " + (num1 * num2 - num3));
              } else if(operation2.equals("*")) {
                  System.out.println(num1 + " * " + num2 + " * " + num3 + " = " + (num1 * num2 * num3));
              } else if(operation2.equals("/")) {
                  System.out.println(num1 + " * " + num2 + " / " + num3 + " = " + (num1 * num2 / num3));
              }
          } else if(operation.equals("/")) {
              if(operation2.equals("+")) {
                  System.out.println(num1 + " / " + num2 + " + " + num3 + " = " + (num1 / num2 + num3));
              } else if(operation2.equals("-")) {
                  System.out.println(num1 + " / " + num2 + " - " + num3 + " = " + (num1 / num2 - num3));
              } else if(operation2.equals("*")) {
                  System.out.println(num1 + " / " + num2 + " * " + num3 + " = " + (num1 / num2 * num3));
              } else if(operation2.equals("/")) {
                  System.out.println(num1 + " / " + num2 + " / " + num3 + " = " + (num1 / num2 / num3));
              }
          }
        }
    }
}