/*
TASK:rtri
LANG:C++
*/
#include<iostream>
using namespace std;
int main()
{
 int n,m;
 unsigned long int res,brh,brv,i;
 cin>>m>>n;
 if(m==1 && n==1){cout<<4<<endl;return 0;}
 if((m==2 && n==1)||(m==1 && n==2)){cout<<14<<endl;return 0;}

 brh=4;
 for(i=2;i<=m;i++)
 {
	brh+=(i-1)*4+4;
 }

 brv=4;
 for(i=2;i<=n;i++)
 {
	brv+=(i-1)*4+4;
 }
 if(brv==4)brv=0;
 res=brh+brv+n*(m-1)*2+m*(n-1)*2;
 cout<<res<<endl;
 return 0;
}