import java.util.Scanner;
  public class Calculator
{
  private double result=0;

  public double getResult ()
  {
    return result;
  }
  public void clear ()
  {
    result = 0;
  }
  public void add (double number1, double number2)
  {
  result = number1 + number2;
  }
  public void add  (double number)
  {
     result +=  number;
  }
  public void mult (double number)
  {
     result *= number;
  }

  public double div (double number)
  { if (number==0)
    {
    System.out.println ("Can't divide by 0");}
   return result /=number;
  }
  }