#############################################################

import sys
sys.setrecursionlimit(10**7)

from heapq import heappop,heappush
from collections import deque,defaultdict,Counter
from bisect import bisect_left, bisect_right
from itertools import product,combinations,permutations

ipt = sys.stdin.readline

def iin():
    return int(ipt())
def lmin():
    return list(map(int,ipt().split()))

MOD = 998244353
#############################################################

P1,P2,Q1,Q2,T = lmin()
P = P1*pow(P2,MOD-2,MOD)
Q = Q1*pow(Q2,MOD-2,MOD)

dp = [[0]*(T+2) for _ in range(T+1)]
dp[0][1] = 1
for i in range(T):
    for j in range(1,T+1):
        dp[i+1][1] += dp[i][j]*P%MOD
        dp[i+1][1] %= MOD
        dp[i+1][j+1] += dp[i][j]*pow(Q,j,MOD)%MOD
        dp[i+1][j+1] %= MOD

ans = 0
for j in range(1,T+2):
    ans += dp[-1][j]
    ans %= MOD

#print(dp)
print(ans)