#include <bits/stdc++.h>

#define el '\n'

using namespace std;

using ll = long long;

void solve() {
    int n, m;
    cin >> n >> m;
    ll ans = 6ll * n * m;
    cout << ans << el;
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int T = 1;
    // cin >> T;
    while (T--) {
        solve();
    }
    return 0;
}