#pragma GCC optimize("O3")
#include <bits/stdc++.h>
using namespace std;
#define endl '\n'
#define ll long long
#define int long long
#define ld long double
#define pii pair<int,int>
#define rand() abs((rand()<<15)|rand())
#define randll() abs(((long long)rand()<<30)|rand())
signed main() {
ios_base::sync_with_stdio(false);
cin.tie(NULL);
long long seed;
asm("rdtsc" : "=A"(seed));
srand(seed);
int q;
cin >> q;
while(q--) {
int X, L, N;
cin >> X >> L >> N;
int counter = X;
vector<int> s1;
int s2 = 0;
int x = 0;
while(counter) {
if(s1.empty()) s1.push_back(0);
s2 = s1.back()^x;
x^=1;
s1.pop_back();
if(s2 > L) {
counter--;
} else {
s2 += N*2;
s1.push_back(s2^x);
s1.push_back(s2^x);
}
}
cout << s2 << endl;
}
}
