use std::io;

macro_rules! parse_input {
   ($x:expr, $t:ident) => ($x.trim().parse::<$t>().unwrap())
}

macro_rules! parse_inputs {
   ($x:expr, $t:ident) => (
       $x.trim()
       .split_whitespace()
       .map(|s| s.parse::<$t>().unwrap())
       .collect::<Vec<$t>>()
   )
}

macro_rules! print_err {
   ($($arg:tt)*) => (
       {
           use std::io::Write;
           writeln!(&mut ::std::io::stderr(), $($arg)*).ok();
       }
   )
}

fn main() {
    let ds = "01234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283848586878889909192939495969798991"
    // let ds = "0999"
        .bytes()
        .map(|x| (x as i64) - 48)
        .collect::<Vec<i64>>();
    let dl = ds.len();

    let mut input_line = String::new();
    io::stdin().read_line(&mut input_line).unwrap();
    let ns = input_line.trim().bytes().map(|x| (x as i64) - 48).collect::<Vec<i64>>();
    let nl = ns.len();
    let mut v = vec![0; dl + nl];

    for (i, n) in ns.iter().rev().enumerate() {
        for (j, d) in ds.iter().rev().enumerate() {
            let tmp = v[j + i];
            // println!("n:{} d:{}", n, d);
            // print!("{}, ", (tmp + n * d));
            // print!("{}, ", (tmp + n * d) % 10);
            // println!("{}", (tmp + n * d) / 10);
            v[j + i] = (tmp + n * d) % 10;
            v[j + i + 1] += (tmp + n * d) / 10;
        }
        // for j in 0..(dl + nl) {
        //     print!("{}", v[j]);
        // }
        // println!("", );
    }

    let mut flag = true;
    for i in (0..dl + nl).rev() {
        if flag && v[i] == 0 {
            continue;
        } else if flag && v[i] != 0 {
            flag = false;
        }
        if i == dl - 2 {
            print!(".{}", v[i]);
        } else if i < dl - 2 {

            print!("{}", v[i]);
        } else {
            print!("{}", v[i]);
        }
    }
    println!("", );
}