#![allow(non_snake_case, unused_must_use, unused_imports)]
use std::io::{self, prelude::*};

fn main() {
    let (stdin, stdout) = (io::read_to_string(io::stdin()).unwrap(), io::stdout());
    let (mut stdin, mut buffer) = (stdin.split_whitespace(), io::BufWriter::new(stdout.lock()));
    for _ in 0..stdin.next().unwrap().parse::<usize>().unwrap() {
        solve(&mut stdin, &mut buffer);
    }
}

fn solve(stdin: &mut std::str::SplitWhitespace, buffer: &mut io::BufWriter<io::StdoutLock>) {
    macro_rules! input {
        ($t: tt, $n: expr) => {
            (0..$n).map(|_| input!($t)).collect::<Vec<_>>()
        };
        (Chars) => {
            input! {String}.chars().collect::<Vec<_>>()
        };
        (Usize1) => {
            stdin.next().unwrap().parse::<usize>().unwrap() - 1
        };
        ($t: ty) => {
            stdin.next().unwrap().parse::<$t>().unwrap()
        };
    }

    let D = input!(isize);
    let mut x = input!(usize);
    let mut y = input!(usize);

    if y > x {
        std::mem::swap(&mut x, &mut y);
    }

    let g = gcd(x, y);

    let v = (x / g, y / g);

    let x = x as isize;
    let y = y as isize;

    let dx = -(v.1 as isize);
    let dy = v.0 as isize;

    let mut ok = 0;
    let mut ng = 1 << 30;

    while ng - ok > 1 {
        let m = (ok + ng) / 2;

        let p = x + dx * m as isize;
        let q = y + dy * m as isize;

        if 0 <= p && p <= D && 0 <= q && q <= D {
            ok = m;
        } else {
            ng = m;
        }
    }
    let p = x + dx * ok as isize;
    let q = y + dy * ok as isize;

    let ans = isize::abs_diff(p * y, x * q);
    writeln!(buffer, "{}", ans);
}

fn gcd(a: usize, b: usize) -> usize {
    if a < b {
        return gcd(b, a);
    }

    if b == 0 {
        return a;
    } else {
        return gcd(b, a % b);
    }
}