#include<bits/stdc++.h>

#define int long long
#define endl '\n'
#define pii std::pair<int ,int>
#define fix(x) std::fixed << std::setprecision(x)
const int inf = 1e17 + 50, MAX_N = 1e5 + 50, mod = 1e9 + 7;

void solve() {
	int n, m;
	std::cin >> n >> m;
	std::cout << 6 * n * m << endl;
}

signed main() {
	std::ios::sync_with_stdio(false);
	std::cin.tie(nullptr), std::cout.tie(nullptr);
	solve();
	return 0;
}