n to 10

import java.util.*;
import java.util.Math;

public class Main{
    public static void main(String[] args) throws Throwable{
        Scanner keyboard = new Scanner(System.in);
        String s = new String();
        int s =  keyboard.next();
        int b = s.length();
        b = b - 1;
        int k =  keyboard.nextInt();
        char x;
        int y=0;
        while(s !=0) {  //эта строка перестала быть актуальной
            x = s.charAt(b);
            b = b - 1;
            Math.pow(k,y)*x;
            y=y+1;
            s=s/10;
        }
    }
}