#include <bits/stdc++.h>
using namespace std;
#define int long long
#define d64 double
void solve()
{
    int n, m;
    cin >> n >> m;
    cout << 6 * n * m << endl;
}
signed main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int t = 1;
    // cin >> t;
    while (t--)
        solve();
}