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

#define int 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);

    int t = 1;
    // cin >> t;
    while (t--) {
        solve();
    }

    return 0;
}