#include <bits/stdc++.h>   using namespace std;   int main() {     ios::sync_with_stdio(false);     cin.tie(0);     int q;     cin >> q;     while (q--) {       long long n, a, b;       cin >> n >> a >> b;       if (n == 1) {         cout << a << endl;         continue;       }       if (n % 2 == 0) {         long long gu = min(n * a, (n / 2) * b);         cout << gu << endl;       } else {         long long gu = min(n * a, (n / 2) * b + a);         cout << gu << endl;       }     }     return 0;   }   