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    public static long repeatedString(String s, long n) {
        // Write your code here
        long count=0;
          for(int i=0;i<s.length();i++){
            if(s.charAt(i)=='a') count++;
          }
          count=count*(n/s.length());
          long rem=(n%(s.length()));
          for(int j=0;j<rem;j++){
             if(s.charAt(j)=='a') count++;
          }
         return count;
        }