#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
const int N = 1e5 + 3;
int T;
int n, num;
using i64 = long long;

void work(){
	i64 n, m, ans;
	cin >> n >> m;
	cout << n * m * 6 << "\n";
	
}


int main(){
//	freopen("test.txt", "r", stdin);
	ios::sync_with_stdio(false);
	cin.tie(0);
	int T = 1;
	while(T--){
		work();
	}	
	return 0;
}