#include <bits/stdc++.h>
using namespace std;

void solve() {
	int n,m;cin>>n>>m;
	cout<<6*n*m<<endl;
}

int main(void) {
	ios::sync_with_stdio(false);
	cin.tie(0),cout.tie(0);
	int t= 1;
	//cin >> t ;
	while(t -- ) {
		solve();
	}
}