sample

#include<bits/stdc++.h>
using namespace std;
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    unsigned short int T,d[10]={0},x[10]={0},y[10]={0},z[10]={0};
    cin>>T;
    for (int i = 0; i < T; i++)
    {
       cin>>d[i] >>x[i] >>y[i] >>z[i];
    }

     for (int i = 0; i < T; i++)
    {
      if(x[i]*7 > (y[i]*d[i] + z[i]*(7-d[i])))
       cout<<x[i]*7<<endl;
      else
       cout<<(y[i]*d[i] + z[i]*(7-d[i]))<<endl;
    }

    return 0;
}