import math
a,b,c,d,e = map(int,input().split())

on = a+b
tw = c+d

prd = (on*tw)//math.gcd(on,tw)

li = [0]*(prd)

for i in range(prd):
    if i%on <= a-1 and i%tw <= c-1:
        li[i] = 1

rui = [0]*(prd+1)

for i in range(prd):
    rui[i+1] = rui[i]+li[i]
#print(li)
#print(rui)
#print(prd,e%prd)

prd_sum = sum(li)
print(prd_sum*(e//prd)+rui[e%prd])