Ecological Premium

#include<bits/stdc++.h>
using namespace std;
int main()
{
    int n,m;
    unsigned long long int a,b,c,sum;
    while((scanf("%d",&n)!=EOF))
    {
        for(int i=0;i<n;i++)
        {
            cin>>m;
            sum=0;
            for(int i=0;i<m;i++)
            {
                cin>>a>>b>>c;
                sum+=a*c;
            }
            cout<<sum<<endl;

        }
    }
    return 0;
}