#include <bits/stdc++.h>

using namespace std;
#define ls o<<1
#define rs o<<1|1
#define fi first
#define se second
typedef long long ll;
typedef pair<int,int> pii;
const int maxn=2e5+10;
const int mod=1e9+7;
const int inf=0x3f3f3f3f;
const ll INF=0x3f3f3f3f3f3f3f3f;


void solve(){
	int a,b;
    scanf("%d%d",&a,&b);
    double ans=a/100.0*b;
    printf("%lf\n",ans);
}
int main(){
    clock_t t1=clock();
	#ifndef ONLINE_JUDGE
        freopen("in.in", "r", stdin);
        freopen("out.out","w",stdout);
    #endif 
	// int T;scanf("%d",&T);while(T--)
	solve();
end:
    cerr<<"Time used "<<clock()-t1<<" ms"<<endl;
	return 0;
}
#include <bits/stdc++.h>
using namespace std;
int main()
{
    int a,b;
    cin >> a >> b;
    cout << (b / (100.0)) * a << endl;
    return 0;
}
