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

void Z()
{
    int n, m;
    cin >> n >> m;
    int ans = n * m * 6;
    cout << ans;
}

int main()
{
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    int t = 1;
    //cin >> t;
    while (t--)
    {
        Z();
    }
    return 0;
}