#include <bits/stdc++.h>
using namespace std;
using ll = long long;

int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    int T;
    cin >> T;
    while(T--){
        ll D, x, y, ans = 0;
        cin >> D >> x >> y;
        auto calc = [&](ll x2, ll y2){
            ans = max(ans, abs(x * y2 - y * x2));
        };
        ll g = gcd(x, y);
        if(g == 0){
            cout << 0 << '\n';
            continue;
        }
        ll dx = y / g, dy = x / g;
        ll d = min(x / dx, (D - y) / dy);
        calc(x - dx * d, y + dy * d);
        d = min((D - x) / dx, y / dy);
        calc(x + dx * d, y - dy * d);
        cout << ans << '\n';
    }
}