#include "bits/stdc++.h"
using namespace std;


//wierd debugging stuff
#define sim template < class c
#define ris return * this
#define dor > debug & operator <<
#define eni(x) sim > typename \
  enable_if<sizeof dud<c>(0) x 1, debug&>::type operator<<(c i) {
sim > struct rge { c b, e; };
sim > rge<c> range(c i, c j) { return rge<c>{i, j}; }
sim > auto dud(c* x) -> decltype(cerr << *x, 0);
sim > char dud(...);
struct debug {
#ifdef LOCAL
~debug() { cerr << endl; }
eni(!=) cerr << boolalpha << i; ris; }
eni(==) ris << range(begin(i), end(i)); }
sim, class b dor(pair < b, c > d) {
  ris << "(" << d.first << ", " << d.second << ")";
}
sim dor(rge<c> d) {
  *this << "[";
  for (auto it = d.b; it != d.e; ++it)
    *this << ", " + 2 * (it == d.b) << *it;
  ris << "]";
}
#else
sim dor(const c&) { ris; }
#endif
};
#define imie(...) " [" << #__VA_ARGS__ ": " << (__VA_ARGS__) << "] "
//end of weird debugging stuff
using ll = long long;
using vi = vector<int>;
using ii = pair<int,int>;
using vll = vector<ll>;
using vvi = vector<vector<int>>;
#define FASTER ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0)
#define invec(v) for(auto& x : v)cin>>x;
#define Test int T;cin>>T;while(T--)
#define REP(i,j,k) for(int i=(j);(i)<(k);(i)++)
#define Time()	cerr <<'\n' << clock() * 1000 / CLOCKS_PER_SEC << "ms\n"
#define SZ(x) (int)x.size();
#define all(x) x.begin,x.end()
// no change 

//const int MxN = 1e9+5;
ll f(int a, int b){
	if(b<=0)return 0;
	ll ans = 2*a + f(a,b-a);
	return ans;
}
ll solve(int a,int b){
	ll ans = 0;
	if(a < b)return ans+=f(a,b);
	else{
		ans = a + solve(a-b,b);
	}
	return ans;
}
int main() {
	int a,b;
	cin >> a >> b;
	cout << 3*(a-gcd(a,b));
	
	
}
