package main

import (
	"bufio"
	"fmt"
	"os"
)

func digitSum(n int) int {
	sum := 0
	for n > 0 {
		sum += n % 10
		n /= 10
	}
	return sum
}

func main() {
	reader := bufio.NewReader(os.Stdin)
	writer := bufio.NewWriter(os.Stdout)
	defer writer.Flush()

	var t int
	fmt.Fscan(reader, &t)

	for i := 0; i < t; i++ {
		var x, k int
		fmt.Fscan(reader, &x, &k)
		for digitSum(x)%k != 0 {
			x++
		}
		fmt.Fprintln(writer, x)
	}
}