#include <bits/stdc++.h>
using namespace std ;
int main() {
int n,m,x,sum,b,ans;
while(cin>>n>>m){
x=n*2;
sum=(2*x+1)*m+x;
b=n*m;
ans=sum-b;
cout<<ans<<endl;
x=0; sum=0; b=0; ans=0;
}
}