function Main(input) {
    const src = input.split("\n");
    const t = parseInt(src[0]);
    let ans = 0;
    for (let i = 1; i <= t; i++) {
        const line = src[i].split(" ");
        ans = (parseInt(line[0]) + 1) * parseInt(line[1]);
        console.log(ans);
    }
}
Main(require("fs").readFileSync("/dev/stdin", "utf8"));