#include <iostream> using namespace std;
#include <iostream>
using namespace std;
double mul(double a, double b){ return a*b; }
double mul(double a, double b){
return a*b;
}
int main(){ int a, b; cin >> a >> b; printf("%.2lf", mul(a, b)); return 0; }
int main(){
int a, b;
cin >> a >> b;
printf("%.2lf", mul(a, b));
return 0;
