"""

想定解？

solve(L,R) = 
L-0.000001 秒を迎えた細胞ひとつが、R+0.9秒でいくつになっているか？

"""

import sys
sys.setrecursionlimit(10**6+10)

mod = 998244353

P1,P2,Q1,Q2,T = map(int,input().split())

P12 = P1 * pow(P2,mod-2,mod) % mod
Q12 = Q1 * pow(Q2,mod-2,mod) % mod

lis = [[None] * (T+1) for i in range(T+1)]

def solve(L,R):

    #print (L,R)
    if lis[L][R] != None:
        return lis[L][R]

    assert L <= R

    live = pow(Q12,L,mod)

    # 自分
    if L == R:
        if L == 0:
            now_me = 1
        else:
            now_me = live
    else:
        if L == 0:
            now_me = solve(L+1,R)
        else:
            now_me = solve(L+1,R) * live

    # 分岐
    if L == 0:
        now_make = 0
    else:
        now_make = solve(0,R-L) * P12

    now = now_me + now_make

    lis[L][R] = now % mod
    return lis[L][R]

print (solve(0,T) % mod)