#include <iostream>
#include <map>
#include <sstream>

using namespace std;



int main ()
{

int numberOfSales;
cin >> numberOfSales;
cin.ignore();


map <string, double> citySales;

string input, tempStr, city;
double price, quantity, money;

while (numberOfSales != 0)
{
    getline (cin, input);
    istringstream istr (input);

     for (int i = 0; i < 4; ++i)
    {
        cycle: istr >> tempStr;

        if (i == 0)
        {
            city = tempStr;
        } else if (i == 1)
        {
            ++i;
            goto cycle;

        } else if (i == 2)
        {
            price = stod (tempStr);
        } else
        {
            quantity = stod (tempStr);
        }
    }

    money = price * quantity;

    if (citySales.find (city) == citySales.end())
    {
        citySales.insert(pair <string, double> {city, money});
    } else
    {
        citySales [city] += money;
    }

    numberOfSales--;
}

map <string, double>::iterator it = citySales.begin();

cout.setf(ios::fixed);
cout.precision(2);

for (it; it != citySales.end(); it++)
{
    cout << it -> first << " -> " << it -> second << endl;
}

return 0;
}