#include<bits/stdc++.h>
using namespace std;
int main(){
	unsigned long long n,m,ans=0;
	cin>>n>>m;
	if(n==0||m==0){
		cout<<"0";
		return 0;
	} 
	while(n!=0&&m!=0){
		if(n>m){
			ans+=(n/m)*4*m;
			n%=m;
		}
		if(n<m){
			ans+=(m/n)*4*n;
			m%=n;
		}
		if(n==m){
			ans+=n*4;
			break;
		}
	}
	cout<<ans;
	return 0;
}

2 3 4 6 9 10 RE