#include<iostream>

#include<cstdio>

#include<algorithm>

#include<cstring>

#include<cmath>

using namespace std;

typedef long long ll;

inline int read()

{

    int x=,f=; char ch=getchar();

    while(ch<''||ch>'') { if(ch=='-') f=-; ch=getchar(); }

    while(ch>=''&&ch<='') { x=(x<<)+(x<<)+(ch^); ch=getchar(); }

    return x*f;

}

int main()

{

    int T=read();

    while(T--)

    {

        int a=read(),b=read(),c=read(),ans=;

        int t=min(b,c/); ans+=t*; b-=t;

        t=min(b/,a); ans+=t*;

        printf("%d\n",ans);

    }

    return ;

}