#include<bits/stdc++.h>
using namespace std;
const int N=998244353;
#define ll long long
ll quick(ll n,ll m){
	ll sum=1;
	while(m){
		if(m&1)sum=sum*n%N;
		m>>=1;
		n=n*n%N;
	}
	return sum%N;
}
ll op=1;
ll possi(ll a,ll b,ll pa, ll pb){
	if(a==b){
		return pa*quick(pa+pb,N-2)%N;
	}
	if(a<b){
		ll g=b/a;
		if(g*a!=b)b-=g*a;
		else {
			g--;
			b=a;
		}
		return possi(a,b,pa,pb)%N*quick(pa,g)%N*quick(quick(pa+pb,g),N-2)%N;
	}else{
		return (possi(a-b,b,pa,pb)%N*quick(pa+pb,N-2)*pb%N+quick(pa+pb,N-2)*pa%N)%N;
	}
}
int main(){
	int T;
	cin>>T;
	while(T--){
		int a,b;
		cin>>a>>b;
		ll qa,qb,qc;
		cin>>qa>>qb>>qc;
		op=1;
		cout<<possi(a,b,qa,qb);
		if(T!=0)cout<<"\n";
	}
}