#include <iostream>
#include <cmath>

using namespace std;
using ll=long long;

ll gcd(ll x,ll y){
    if(y==0) return x;

    return gcd(y,x%y);
}

int main(){
    ll a,b,c,d,e;
    cin>>a>>b>>c>>d>>e;

    ll first=a+b,second=c+d;
    ll lcm=first*second/gcd(first,second);
    ll part=0;

    for(ll t=0;t<lcm;t++){
        if(t%first<a&&t%second<c){
            part++;
        }
    }
    ll ans=part*(e/lcm);

    for(ll t=0;t<e%lcm;t++){
        if(t%first<a&&t%second<c){
            ans++;
        }
    }
    cout<<ans<<endl;

    return 0;
}