#include <iostream>
#include <cmath>
#include <cstdio>
#include <algorithm>
#include <cstring>
#define ll long long
using namespace std;
long long t,n,p,q;
ll minn(ll a,ll b)
{
    if(a>=b)
    return b;
    return a;
}
long long _do(ll a,ll b,ll c)
{
    long long s1,s2;
    s1=n*p;
    s2=(n%2)*p+(n/2)*q;
    return minn(s1,s2);
}
int main()
{
    cin>>t;
    while(t--)
    {
        scanf("%lld%lld%lld",&n,&p,&q);
        printf("%lld\n",_do(n,p,q));
    }
    return 0;
}