#include <bits/stdc++.h>
using namespace std;
using i64 = long long;

void solve() {
    int n, m;
    cin >> n >> m;
    
    cout << 6 * (n * m) << "\n";
}

signed main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);

    int t = 1;
    // cin >> t;

    while (t--) {
        solve();
    }

    return 0;
}