#![allow(unused_imports, dead_code, unused_macros, unused_variables, non_snake_case, unused_parens)]
use std::cmp::{min,max,Ordering,Reverse};
use std::mem::swap;
use std::collections::{VecDeque,LinkedList,HashMap,BTreeMap,HashSet,BTreeSet,BinaryHeap};



fn main() {
	let n:i64= {
		let mut line: String = String::new();
		std::io::stdin().read_line(&mut line).unwrap();
		line.trim().parse().unwrap()
	};
	let r:f64= {
		let mut line: String = String::new();
		std::io::stdin().read_line(&mut line).unwrap();
		line.trim().parse().unwrap()
	};
	let mut ans = 0.0;
	let mut x = 100.0;
	for _ in 0..n {
		ans += x;
		x *= 1.-r;
	}

	println!("{}", ans);
}