#include<bits/stdc++.h>
using namespace std;
using ll = long long;
const ll N = 105;
const ll inf = 0x3f3f3f3f;
const ll MOD = 998244353;

void solve() {
	ll n,m;cin>>n>>m;
	cout<<6*n*m;
}

signed main() {
	int _ = 1;//cin >> _;
	while (_--) solve();
	return 0;
}