#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define rep(i,l,r) for(ll i=l;i<=r;++i)
#define rep_(i,r,l) for(ll i=r;i>=l;--i)
const ll N = 2e5 + 7;
const ll P = 1e9 + 7;
void solve() {
	ll n, m;
	cin >> n >> m;
	cout << n * m * 6ll;
}
int main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	int T(1);
	//cin >> T;
	while (T--) {
		solve();
	}
}