#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define mod (998244353)
#define PI 3.14159265358979323846
#define PII pair<int,int>
#define F first
#define S second
#define N 1000010
#define pb push_back
ll n,m;
void solve() {
	cin>>n>>m;
	if(n>=2&&m>=2)cout<<n*m*6<<'\n';
}
int main() {
	ios::sync_with_stdio(false);
	cin.tie(0);cout.tie(0);
	int _ = 1;
	//cin >> _;
	while (_--) {
		cout<<fixed<<setprecision(15);
		solve();
	}
	return 0;
}
/*
*/