#include <bits/stdc++.h>
using namespace std;
#define f first
#define s second
#define pb push_back
#define FOR(i,a,b) for(i=(a);i<=(b);++i)
#define FORS(i,a,b) for(i=(a);i<(b);++i)
#define vpp vector<pair<int,int>>
#define ll long long
#define maxn 2005

ll lit;
int a,b,T;

int main()
{
    //freopen("parc.in","r",stdin);
    //freopen("parc.out","w",stdout);
    cin>>T;
    for(;T--;){
        cin>>lit>>a>>b;
        if(a*2<=b)
            cout<<1LL*lit*a;
        else{
            if(lit%2==1)
                cout<<1LL*(lit-1)*b/2+a;
            else
                cout<<1LL*lit*b/2;
        }
        cout<<'\n';
    }
}