#include <cstdio>
#include <iostream>
using namespace std;
int main(){
	int p,c;	scanf("%d %d",&p,&c);
	long long int ans=1,ifac=1;
	for(int i=0;i<p;i++){
		ans*=41;	ifac*=6;
	}
	for(int j=0;j<c;j++){
		ans*=49;	ifac*=6;
	}
	printf("%.20lf\n",ans/(double)ifac);
	return 0;
}