#include<bits/stdc++.h>

using namespace std;
#define ll long long

const int N = 1;

ll T, n, m;

void solve() {
    cin >> n >> m;
    cout << n * m * 6;
}

int main() {
    std::ios::sync_with_stdio(false);
    std::cin.tie(nullptr), std::cout.tie(nullptr);

    T = 1;
    while (T--) {
        solve();
    }

    return 0;
}