#include<bits/stdc++.h>
#define rep(i,a,b) for(int i=a;i<b;i++)
#define rrep(i,a,b) for(int i=a;i>=b;i--)
#define fore(i,a) for(auto& i:a)
#define ff first 
#define ss second 
#define all(a) begin(a),end(a)
#define allr(a) rbegin(a),rend(a)
#define pb push_back
using namespace std;
using ll =long long;
using pii=pair<int,int>;
using pll=pair<ll,ll>;
using vi=vector<int>;
using vll=vector<ll>;
template<class T> inline bool chmin(T& a,T b){return a>b?a=b,1:0;}
template<class T> inline bool chmax(T& a,T b){return a<b?a=b,1:0;}

//modint
template <std::uint_fast64_t Modulus> class modint {
    using u64 = std::uint_fast64_t;

public:
    u64 a;

    constexpr modint(const u64 x = 0) noexcept : a(x % Modulus) {}
    constexpr u64 &val() noexcept { return a; }
    constexpr const u64 &val() const noexcept { return a; }
    constexpr modint operator+(const modint rhs) const noexcept {
        return modint(*this) += rhs;
    }
    constexpr modint operator-(const modint rhs) const noexcept {
        return modint(*this) -= rhs;
    }
    constexpr modint operator*(const modint rhs) const noexcept {
        return modint(*this) *= rhs;
    }
    constexpr modint operator/(const modint rhs) const noexcept {
        return modint(*this) /= rhs;
    }
    constexpr modint &operator+=(const modint rhs) noexcept {
        a += rhs.a;
        if (a >= Modulus) {
            a -= Modulus;
        }
        return *this;
    }
    constexpr modint &operator-=(const modint rhs) noexcept {
        if (a < rhs.a) {
            a += Modulus;
        }
        a -= rhs.a;
        return *this;
    }
    constexpr modint &operator*=(const modint rhs) noexcept {
        a = a * rhs.a % Modulus;
        return *this;
    }
    constexpr modint &operator/=(modint rhs) noexcept {
        u64 exp = Modulus - 2;
        while (exp) {
        if (exp % 2) {
          *this *= rhs;
        }
        rhs *= rhs;
        exp /= 2;
        }
        return *this;
    }
};
using mint9=modint<998244353>;
using mint1=modint<1000000007>;

ll m;
string s;
void solve(){
    int n=s.size();
    reverse(all(s));
    vector<mint9> pre(n);
    mint9 sum=1;
    rep(i,0,n){
        pre[i]=(m-(s[i]-'0')-1)/10;
        sum*=(pre[i]+1);
    }
    mint9 powm=1;
    mint9 ans=0;
    rep(i,0,n){
        mint9 j=(s[i]-'0');
        mint9 L=pre[i];
        //cout<<powm.val()<<' '<<((L*5+j)*(L+1)).val()<<' '<<((sum/pre[i]).val())<<endl;
        ans+=powm*(L*5+j)*(L+1)*sum/(pre[i]+1);
        powm*=m;
    }
    cout<<ans.val()<<endl;

}
int main(){
    cin.tie(0)->sync_with_stdio(0);
    cin>>m>>s;
    solve();
    return 0;
}
/*
桁ごとに独立としてよさそう
*/