public class Calculator{
  public static void main(String[] args){
    //Enter expression as 'a + b'
    int result = 0;
    switch(args[1].charAt(0)){
      case '+': result = Integer.parseInt(args[0]) + Integer.parseInt(args[2]);
                break;
      case '-': result = Integer.parseInt(args[0]) - Integer.parseInt(args[2]);
                break;
      case '*': result = Integer.parseInt(args[0]) * Integer.parseInt(args[2]);
                break;
      case '/': result = Integer.parseInt(args[0]) / Integer.parseInt(args[2]);
    }
    System.out.println(args[0] + ' ' + args[1] + ' ' + args[2]  + " = " + result);
  }
}