#include<bits/stdc++.h>
using namespace std;
using Int = long long;

struct Precision{
  Precision(){
    cout<<fixed<<setprecision(12);
  }
}precision_beet;

//INSERT ABOVE HERE
signed main(){
  double x=41.0/6,y=49.0/6;
  Int a,b;
  cin>>a>>b;
  double ans=1;
  for(Int i=0;i<a;i++) ans*=x;
  for(Int i=0;i<b;i++) ans*=y;
  cout<<ans<<endl;
  return 0;
}