#include<bits/stdc++.h>
using namespace std;
#define int long long
#define ll __int128
#define PII pair<int,int>
#define endl '\n'
#define mk make_pair
#define IOS ios::sync_with_stdio(false),cin.tie(nullptr),cout.tie(nullptr);
#define Pi acos(-1.0)
#define ull unsigned long long
int ls(int p){ return (p << 1) ;}
int rs(int p){ return (p << 1 | 1) ;}
inline int lowbit(int x) { return x & (-x) ;}
const int mod = 998244353;
const int N = 2e5 + 5;


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

signed main(){
    IOS
    int O_O = 1;
//    cin >> O_O;
    while(O_O--) solve();
}