import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {
	 public static void main(String[] args) {
	      BufferedReader stdReader =new BufferedReader(new InputStreamReader(System.in));
	      try {
	    	  String line = stdReader.readLine();
	    	  int ans = 0;
	    	  int index = 0;
	    	  String op = "";
	    	  for(int i=0;i<line.length();i++){
	    		  if(line.charAt(i) == '+'){
	    			  if(op.equals("+")){
	    				  ans += Integer.parseInt(line.substring(index, i));
	    			  }else if(op.equals("*")){
	    				  ans *= Integer.parseInt(line.substring(index, i));
	    			  }else{
	    				  ans = Integer.parseInt(line.substring(index, i));
	    			  }
	    			  op = "*";
	    			  index = i+1;
	    		  }else if(line.charAt(i) == '*'){
	    			  if(op.equals("+")){
	    				  ans += Integer.parseInt(line.substring(index, i));
	    			  }else if(op.equals("*")){
	    				  ans *= Integer.parseInt(line.substring(index, i));
	    			  }else{
	    				  ans = Integer.parseInt(line.substring(index, i));
	    			  }
	    			  op = "+";
	    			  index = i+1;
	    		  } 
	    	  }
			  if(op.equals("+")){
				  ans += Integer.parseInt(line.substring(index, line.length()));
			  }else if(op.equals("*")){
				  ans *= Integer.parseInt(line.substring(index, line.length()));
			  }
	    	  System.out.println(ans);
	      } catch (IOException e) {
			e.printStackTrace();
	      }
	}
}