use std::io::Read;

fn main() {
	let mut t = String::new();
	std::io::stdin().read_line(&mut t).ok();
	let t: u32 = t.trim().parse().unwrap();
	let mut ab = String::new();
	std::io::stdin().read_to_string(&mut ab).ok();
	let mut ab = ab.trim().split_whitespace();
	for _ in 0..t {
		let a = ab.next().unwrap().parse::<u32>().unwrap();
		let b = ab.next().unwrap().parse::<u32>().unwrap();
		println!("{}", (a + 1) * b);
	}
}