#include<bits/stdc++.h>
#define int long long
using namespace std;
#define dbg(x...) \
do{ \
	cout << #x << " -> "; \
	err(x); \
}while(0)
void err(){
	cout << endl;
}
template<class T, class ...Ts>
void err(T arg, Ts ...args){
	cout << fixed << setprecision(10) << arg << ' ';
	err(args...);
}
void solve(){
	int n, m; cin >> n >> m;
	cout << n * m * 6 << '\n';
	return ;
}
signed main(){
	ios::sync_with_stdio(false);
	cin.tie(0);
	int t = 1;
	// cin >> t;
	while(t--)solve();
	return 0;
}