def lcm(x,y):
    def gcd(x, y):
        if y == 0:
            return x
        else:
            return gcd(y,x%y)
    return (x*y)//gcd(x,y)

s = list(map(int,input().split()))
lc = lcm(s[0]+s[1],s[2]+s[3])
sec = [0]*lc
for i in range(0,lc):
    x = i%(s[0]+s[1])
    y = i%(s[2]+s[3])
    if x<s[0] and y<s[2]:
        sec[i] = 1
print(sum(sec)*(s[4]//lc)+sum(sec[:s[4]%lc]))