#include<bits/stdc++.h>
using namespace std;
#define int long long
const int N = 1e6 + 100;
const int mod = 998244353;
void solve() {
	int n, m;
	cin >> n >> m;
	cout << n * m * 6 << endl;
}
signed main() {
	int t = 1;
	//cin >> t;
	while(t--) solve();
}