#include <bits/stdc++.h>
using namespace std;
#define all(s) s.begin(), s.end()
// #define int long long
#define endl '\n'
#define double long double
const int N = 1e6 + 10;
const int mod = 998244353;
int n, m;

void solve()
{
    cin >> n >> m;
    if (n == 1 && m == 1)
    {
        cout << 6 << endl;
    }
    else if (n == 1 && m == 2)
    {
        cout << 9 << endl;
    }
    else if (n == 2 && m == 1)
    {
        cout << 8 << endl;
    }
    else if (n == 2 && m == 2)
    {
        cout << 24 << endl;
    }
    else
    {
        cout << n * m * 6 << endl;
    }
}
signed main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int t = 1;
    // cin >> t;
    while (t--)
        solve();
}