#include <bits/stdc++.h>
#include <atcoder/all>
using mint = atcoder::modint998244353;
using namespace std;
int main(){
	int T;
	cin >> T;
	while (T--){
		int N, M;
		cin >> N >> M;
		cout << (mint(10).pow(N % M) - 1).val() << endl;
	}
}