#include<bits/stdc++.h>
#define endl '\n'
#define ll long long
#define pii pair<ll, ll>
const ll inf = 2e18;
const double eps = 1e-9;
using namespace std;
void slv(){
    ll n, m; cin >> n >> m;
    cout << n * m * 6 << endl;
}

int main(){
    ios::sync_with_stdio(0), cin.tie(0);
    int _ = 1;
    //cin >> _;
    while(_--) slv();
    return 0;
}