#include <iostream>
#include <iomanip>

#include <algorithm>
#include <string>
/////////
#define REP(i, x, n) for(int i = x; i < n; i++)
#define rep(i,n) REP(i,0,n)
#define P(p) cout<<(p)<<endl;
/////////
typedef long long LL;
typedef long double LD;
/////////
using namespace::std;
/////////

int main(void){
	cin.tie(0);
	ios::sync_with_stdio(false);
	cout << fixed;//
	//cout << setprecision(7);//
	
	int D;
	cin >> D;//[1,10^7]
	int p;
	cin >> p;//[0,100]

	int ans = 0;
	ans = D;
	int D_div10000;
	int D_xxxx;
	D_div10000 = D/10000;
	D_xxxx	   = D%10000;
	
	ans += D_div10000*p*100 + (D_xxxx*p)/100;

	P(ans);

	return 0;
}