fn main() {
    let mut xx = String::new();
    std::io::Read::read_to_string(&mut std::io::stdin(), &mut xx).ok();
    let xx: Vec<u64> = xx.split_whitespace().skip(1).flat_map(str::parse).collect();

    let answer = xx
        .chunks(2)
        .map(|x| ((x[0] + 1) * x[1]).to_string())
        .collect::<Vec<String>>()
        .join("\n");

    println!("{answer}");
}