a+aa+aaa+aaaa+aaaaa.....

public class Eight{
	public static void main(String args[]){
		long sum=0,a=8,n=12,t=a;
		for(int i=1;i<=n;i++){
			sum=sum+a;
			a=a*10+t;
		}
		System.out.println(sum);
	}
}