//GIVE ME AC!!!!!!!!!!!!!!!!!
#pragma GCC target("avx")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#include<bits/stdc++.h>
#define ll long long
#define floatset() fixed<<setprecision(15)
#define all(n) n.begin(),n.end()
#define rall(n) n.rbegin(),n.rend()
#define rep(i, s, n) for (ll i = s; i < (ll)(n); i++)
using namespace std;
const int dx[4] = {1, 0, -1, 0};
const int dy[4] = {0, 1, 0, -1};
const ll inf =1e18;
const ll MOD=1000000007;
const ll mod=998244353;
const double pi=acos(-1);
using P=pair<ll,ll>;
int main(){
    ll a,b,c,d;
    cin>>a>>b>>c>>d;
    ll e;
    cin>>e;
    ll x=a+b,y=c+d;
    ll cnt=0;
    rep(i,0,lcm(x,y)){
        if((i%x)<a&&(i%y)<c){
            cnt++;
        }
    }
  //cout<<cnt<<endl;
  //cout<<lcm(x,y)<<endl;
    ll ans=e/lcm(x,y)*cnt;
    rep(i,0,e%lcm(x,y)){
        if(i%x<a&&i%y<c){
            ans++;
        }
    }
  cout<<ans<<endl;
}