#include <iostream>
using namespace std;
using ll = long long;
#define rep(i,n) for(int i=0; i<(n); i++)

int main(){
  int A,B,C,D; scanf("%d%d%d%d",&A,&B,&C,&D);
  int E; scanf("%d",&E);
  int cy = (A+B)*(C+D);
  int cyans = 0;
  int ans = 0;
  rep(t,cy){
    int tmp = 1;
    if(t%(A+B) >= A) tmp = 0;
    if(t%(C+D) >= C) tmp = 0;
    cyans += tmp;
    if(E%cy > t) ans += tmp;
  }
  ans += cyans * (E/cy);
  printf("%d\n",ans);
  return 0;
}