package main

import (
	"fmt"
)

func main() {
	var A, B, C, D, E int
	fmt.Scan(&A, &B, &C, &D, &E)

	dur := (A + B) * (C + D)
	num := E / dur
	rem := E % dur

	n := calc(A, B, C, D, dur) * num
	n += calc(A, B, C, D, rem)
	fmt.Println(n)
}

func calc(A, B, C, D, E int) int {
	n := 0
	for t := 0; t < E; t++ {
		if t%(A+B) < A && t%(C+D) < C {
			n++
		}
	}
	return n
}