A

#include <bits/stdc++.h>

using namespace std;

#define ll     long long
#define _test   int _TEST; cin>>_TEST; while(_TEST--)
#define pb     push_back
#define ppb    pop_back
#define pf     push_front
#define ppf    pop_front

int main()
{
    _test
    {
        int n, a, b;
        cin>>n>>a>>b;

        if(b < 2*a)
            cout<<(n/2)*b + (n%2)*a<<"\n";
        else
            cout<<n*a<<"\n";
    }
}