a,b,c,d,e = map(int,input().split())
lim = (a+b)*(c+d)
x = a+b
y = c+d
cnt=0

if e <= lim:
    for i in range(1,e+1):
        if 1 <= i%x <= a and 1 <= i%y <= c:
            cnt+=1
    print(cnt)

else:
    for i in range(1,lim+1):
        if 1 <= i%x <= a and 1 <= i%y <= c:
            cnt+=1
    div,mod=divmod(e,lim)
    cnt = div*cnt
    
    for i in range(1,mod+1):
        if 1 <= i%x <= a and 1 <= i%y <= c:
            cnt+=1
    
    print(cnt)