#include<iostream>
using namespace std;
int main()
{
	int a,i=1;
	cin >> a;
	while (a--){
		int c, d;
		float sum;
		cin >> c >> d;
		if (c*d%2 == 0){
			sum = float(c*d);
	        cout << "Scenario #" << i <<":"<< endl;
			printf("%.2f\n", sum);
			cout << endl;
		}
		else {
			cout << "Scenario #" << i <<":"<< endl;
			cout << c*d+0.41<< endl;
			cout << endl;
		}
		i++;
	}
	return 0;
}