#include
using namespace std;
int main()
{
long long int t,tot=0,i,n,b,m,k,time;
cin>>t;
for(i=0;i<t;i++)
{
cin>>n>>b>>m;
while(n>0)
{
if(n%2==0)
{
k=n/2;
time=km;
if(n==1)
{
b=0;
}
tot=tot+time+b;
n=n-k;
m=m2;
}
else
{
k=(n+1)/2;
time=k*m;
if(n==1)
{
b=0;
}
tot=tot+time+b;
n=n-k;
m=m*2;
}
}
cout<<tot<<endl;
}
return(0);
}