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

uint64_t gcd(const uint64_t a, const uint64_t b) {
  return b == 0 ? a : gcd(b, a % b);
}

int main() {
  uint64_t E;
  uint32_t A, B, C, D;
  cin >> A >> B >> C >> D >> E;

  const uint32_t work_rest_1 = A + B;
  const uint32_t work_rest_2 = C + D;
  const uint64_t work_lcm =
      work_rest_1 * work_rest_2 / gcd(work_rest_1, work_rest_2);
  uint64_t count = 0;

  if (work_lcm < E) {
    for (uint64_t t = 0; t < work_lcm; ++t) {
      bool work_1 = (t % work_rest_1 < A);
      bool work_2 = (t % work_rest_2 < C);
      if (work_1 && work_2) {
        ++count;
      }
    }

    count *= E / work_lcm;

    const uint64_t mod_E_lcm = E % work_lcm;
    for (uint64_t t = 0; t < mod_E_lcm; ++t) {
      bool work_1 = (t % work_rest_1 < A);
      bool work_2 = (t % work_rest_2 < C);
      if (work_1 && work_2) {
        ++count;
      }
    }
  } else {
    for (uint64_t t = 0; t < E; ++t) {
      bool work_1 = (t % work_rest_1 < A);
      bool work_2 = (t % work_rest_2 < C);
      if (work_1 && work_2) {
        ++count;
      }
    }
  }

  cout << count << endl;
}