#include <stdio.h>
#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf 1000000000



int main(){
	
	long long ans = (19*43+28*47)*2021/(47*43*27);
	cout<<ans<<endl;
	
    return 0;
}