a,b,c,d,e=map(int,input().split())
from math import gcd
lcm=(a+b)*(c+d)//gcd(a+b,c+d)
rob1=[0,a];rob2=[0,c]
now=0
cnt_cycle=0
for now in range(lcm):
    if rob1[0]<=now<rob1[1] and rob2[0]<=now<rob2[1]:
        cnt_cycle+=1
    if rob2[1]<=now:
        rob2=[rob2[0]+c+d,rob2[1]+c+d]
    if rob1[1]<=now:
        rob1=[rob1[0]+a+b,rob1[1]+a+b]
ans=e//lcm*cnt_cycle
amari=e%lcm
rob1=[0,a];rob2=[0,c]
for now in range(amari):
    if rob1[0]<=now<rob1[1] and rob2[0]<=now<rob2[1]:
        ans+=1
    if rob2[1]<=now:
        rob2=[rob2[0]+c+d,rob2[1]+c+d]
    if rob1[1]<=now:
        rob1=[rob1[0]+a+b,rob1[1]+a+b]
print(ans)