import sys
from typing import List, Tuple

int1 = lambda x: int(x) - 1
input = lambda: sys.stdin.readline().rstrip('\n')
ii = lambda: int(input())
vi = lambda: list(map(int, input().split()))
vi1 = lambda: list(map(int1, input().split()))


def dbg(*args, **kwargs):
    print(*(repr(arg) for arg in args), *(f'{k}: {repr(v)}' for k, v in kwargs.items()),
          sep='; ', file=sys.stderr, flush=True)


def main():
    a, b, c, d, e = vi()
    z = [0] * ((a + b) * (c + d))
    for i in range((a + b) * (c + d)):
        if i % (a + b) < a and i % (c + d) < c:
            z[i] = 1
    return (e // ((a + b) * (c + d))) * sum(z) + sum(z[:e % ((a + b) * (c + d))])


def _start():
    if (ret := main()) is not None:
        print(*ret) if isinstance(ret, List) or isinstance(ret, Tuple) else print(ret)


if __name__ == '__main__':
    _start()