use std::io;
use std::str::FromStr;

fn main() {
    let stdin = io::stdin();
    let mut buf = String::new();
    stdin.read_line(&mut buf).ok();

    let mut it = buf.split_whitespace().map(|n| f64::from_str(n).unwrap());
    let a = it.next().unwrap();

    let mut buf = String::new();
    stdin.read_line(&mut buf).ok();

    let mut it = buf.split_whitespace().map(|n| f64::from_str(n).unwrap());
    let b = it.next().unwrap();

    let c = 100_f64 - a;

    let ans = (b / c) * a + b;
    print!("{}\n", ans);

}