#include <bits/stdc++.h>
#define endl '\n'
using namespace std;
using ll = long long;
using db = long double;

void solve()
{
    int n, m;
    cin >> n >> m;
    cout << n * m * 6 << endl;
}
int main()
{
#ifdef x3ea
    freopen("in.txt", "r", stdin);
#endif
    cout << fixed << setprecision(11);
    ios::sync_with_stdio(false);
    cin.tie(0), cout.tie(0);
    int _ = 1;
    //  cin >> _;
    for (; _; _--)
        solve();
    return 0;
}