#include<bits/stdc++.h>
using namespace std;
#define rep(i,a,n) for(int i=a;i<=n;i++)
#define per(i,a,n) for(int i=n;i>=a;i--)
#define endl '\n'
#define ll long long
#define pb push_back

const int N=1e6+10;

//////////////////


/////////////////


/////////////////

void init()
{

}

/////////////////

int main()
{
    ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
  //  freopen("ain.txt","r",stdin);freopen("aout.txt","w",stdout);

    ll n,m;
    cin>>n>>m;
    cout<<6ll*n*m;

    return 0;
}