#include<iostream>
using namespace std;
int main()
{
    int q,a,b,i,j,r;
    long long int n,res;
    cin>>q;
    long long int arr[q];

    for(i=0;i<q;i++)
    {
        cin>>n>>a>>b;
        if(a>=b){
            if(n%2==0)res=(n/2)*b;
            else res=((n/2)*b)+a;
        }
        else {
            r=b/2;
            if(r<a)res=n*b;
            else res=n*a;

        }
        arr[i]=res;
    }
    for(i=0;i<q;i++)
    {
        cout<<arr[i]<<endl;
    }

    return 0;
}