#include<bits/stdc++.h>

using namespace std;

const int N = 1e5+10;

int a[N];

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

int main()
{
    int tt =1;
    // cin >> tt;
    while(tt--)
    {
        solve();
    }
}