#include<bits/stdc++.h>
#include<atcoder/all>
using namespace std;
using namespace atcoder;
using mint = modint998244353;
using ll = long long;
int mod = 998244353;
ll modPow(ll a, ll n, ll mod){
    if(mod==1) return 0;
    ll ret = 1;
    ll p = a % mod;
    while(n){
         if (n & 1) ret = ret * p % mod; 
         p = p * p % mod; n >>= 1;
         } 
    return ret; 
}

int main(){
    int M;
    string N;
    cin >> M >> N;
    reverse(N.begin(),N.end());//小さい位から考えたいので数字列を反転させる
    vector<int> a(N.size());
    for(int i = 0;i < N.size();i++){
        a[i] = stoi(N.substr(i,1));
    }
    vector<mint> pattern(N.size());
    mint pattim = 1;
    for(int i = 0;i < N.size();i++){
        pattern[i] = (M-1-a[i]) / 10 + 1;
        pattim *= pattern[i];
    }
    mint ans = 0;
    for(int i = 0;i < N.size();i++){
        ans += modPow(M,i,mod) * (pattim / pattern[i]) * ((pattern[i] * (pattern[i] + 1) / 2) * 10 - pattern[i] * (10-a[i]));
    }
    cout << ans.val() << endl;
    return 0;
}