#include<bits/stdc++.h>
#define int long long
#define ll long long
#define endl '\n'
using namespace std;
void solve(){
	int n,m;
	cin>>n>>m;
	cout<<n*m*6<<endl;
	return ;
}
int T=1;
signed main(){
	ios::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
//	cin>>T;
	for(int kase=1;kase<=T;kase++){
		solve();
	}
	return 0;
}