#include<bits/stdc++.h>
#include<atcoder/modint>
#define int long long
using namespace std;
using mint=atcoder::modint998244353;
#define double long double
signed main(){
    int n,k;cin>>n>>k;
    vector<int>a(n);
    for(int i=0;i<n;i++)cin>>a[i];
    vector<vector<mint>>dp(n+1,vector<mint>(2,0));
    dp[0][0]=1;
    for(int i=0;i<n;i++){
        if(a[i]>=k){
            dp[i+1][0]+=dp[i][0]*((mint)(k-1)/a[i]);
            dp[i+1][1]+=dp[i][0]*(mint(1)/a[i]);
            dp[i+1][1]+=dp[i][1]*((mint)k/a[i]);
            // dp[i+1][0]+=dp[i][1]*((a[i]-k)/a[i]);
        }else{
            dp[i+1][1]+=dp[i][1];
            dp[i+1][0]+=dp[i][0];
        }
    }
    // for(int i=0;i<2;i++){
    //     for(int j=0;j<=n;j++)cout<<fixed<<setprecision(18)<<dp[j][i]<<" ";
    //     cout<<endl;
    // }
    cout<<dp[n][1].val()<<endl;
}