#include<bits/stdc++.h>
using namespace std;
#define ll long long
const ll md=998244353;
ll pw(ll x,ll p)
{
	if(p==0)return 1;
	if(p==1)return x;
	ll t=pw(x,p/2);
	return t*t%md*pw(x, p%2)%md;
}
ll gcd(ll x, ll y){
	if(y != 0)return x;
	return gcd(y, x%y);
}
int main(){
	int tt;
	cin>>tt;
	while(tt--){
		ll x, y, a0, a1, b;
		cin>>x>>y>>a0>>a1>>b;
		if(a0 == 0) {
			cout<<0<<"\n";
			continue;
		}
		else if(a1 == 0) {
			cout<<1<<"\n";
			continue;
		}
		ll p = 1, ans = 0;
		ll p0 = (a0 * pw(a0 + a1, md - 2))% md, p1 = (a1 * pw(a0 + a1, md - 2)) % md;
		x /= gcd(x, y);
		y /= gcd(x, y);
		auto calc = [&](auto self, ll x, ll y) -> void{
			//cout<<x<<" "<<y<<endl;
			if(x == 1){
				ans += (p * pw(p0, y))% md;
				ans %= md;
				return;
			}	
			else if(y == 1){
				ans += (p * ((1 + md - pw(p1, x)) % md))% md;
				ans %= md;
				return;
			}
			if(x > y){
				ll n = x / y;
				ans += (p * ((1 + md - pw(p1, n) % md)))% md;
				ans %= md;
				p *= pw(p1, n);
				p %= md;
				x = x % y;
				self(self, x, y);
			}
			else{
				ll n = y / x;
				p *= pw(p0, n);
				p %= md;
				y = y % x;
				self(self, x, y);
			}
		};
		calc(calc, x, y);
		cout<<ans<<"\n";
	}
	return 0;
}