#include <iostream>
#include<fstream>
#include <iomanip>
using namespace std;

void read_and_write(ifstream &f, ofstream&g)
{
	int n, a, b;
	f >> n;
	double s = 0.0;
	int* mas = new int[n];
	for (int i = 0; i < n; i++)
	{
		f >> a >> b;
		mas[i] = a * b;
		s = s + mas[i]*1.0;
	}

	for (int i = 0; i < n; i++)
	{
		g << mas[i] / s<<endl;
	}
	delete[]mas;
	f.close();
	g.close();
}
int main()
{
	setlocale(LC_ALL, "Russian");
	ifstream in("input.txt");
	ofstream out("output.txt");
	read_and_write(in, out);
	return 0;
}