UVa 10300 - Ecological Premium

// UVa 10300 - Ecological Premium
#include <iostream>
using namespace std;

int main() {
	int cases;
	cin >> cases;
	for (; cases > 0; cases--) {
		int n;
		cin >> n;
		long long unsigned int sol = 0, a, b, c;
		for (int i = 0; i < n; i++) {
			cin >> a >> b >> c;
			sol += a * c;
		}
		cout << sol << endl;
	}
	return 0;
}