#include <stdio.h>
#include <string.h>
#include <stdlib.h>

int main(){
    long long int num, money, len;
    int i;
    char str[20] = {'\0'};

    scanf("%lld\n", &num);
    money = num*108;
    sprintf(str, "%lld", money);
    len = strlen(str);

    for(i = 0; i < len; i++){
        printf("%c", str[i]);
        if(i == len - 3)    printf(".");
    }
    printf("\n");

    return 0;
}