#include <bits/stdc++.h>

using namespace std;


using i32 = int32_t;
using i64 = long long;


using vi = vector<int>;
using pii = pair<int,int>;


i32 main() {
	ios::sync_with_stdio(false), cin.tie(nullptr);
	i64 n, m;
	cin >> n >> m;
	cout << n * m * 6ll << "\n";
	return 0;
}