use proconio::{fastout, input};

#[fastout]
fn main() {
    input! {
        testcases: [(u16, u16)],
    }

    println!("{}", output(solve(testcases)));
}

fn solve(testcases: Vec<(u16, u16)>) -> Vec<u32> {
    testcases
        .into_iter()
        .map(|(a, b)| (a + 1) as u32 * b as u32)
        .collect()
}

fn output(ans: Vec<u32>) -> String {
    ans.into_iter()
        .map(|x| x.to_string())
        .collect::<Vec<_>>()
        .join("\n")
}