#include<bits/stdc++.h>
using namespace std;
#define int long long    
#define vi vector<int>
#define vii vector<vi>
#define pb push_back
#define pir pair<int,int>
const int P = 1e9 + 7;
const int N = 1e6+7;
const int inf = 0x3f3f3f3f3f3f3f3f;//longlong
const int ing = 1e18;
const int mod = 1e9+7;
int  n,m;
int ax, bx,ay,by;
void solve()
{
	cin>>n>>m;
	if(n*m==1){
		cout<<"6\n";
	}
	else if(n*m==2&&n==1){
		cout<<"9\n";
	}
	else if(n*m==2&&m==1){
		cout<<"8\n";
	}
	else cout<<n*m*6<<"\n";
}
signed main()
{
	cin.tie(0)->sync_with_stdio(0);
	int _ = 1;
	//cin >> _;
	while (_--)
	{
		solve();
	}
}