#include<bits/stdc++.h>
#define int long long
using namespace std;
const int mod=998244353;
int T,x,y,a,b,c;
int q_mi(int p,int q)
{
	int sm=1;
	while(q)
	{
		if(q&1) sm=sm*p%mod; 
		p=p*p%mod;
		q>>=1;
	}
	return sm%mod;
}
int inv(int x)
{
	return (q_mi(x,mod-2)%mod+mod)%mod;
}
signed main()
{
	cin>>T;
	while(T--)
	{
		cin>>x>>y>>a>>b>>c;
		int p=a*q_mi(a+b,mod-2); 
		int q=b*q_mi(a+b,mod-2); 
		int as=0,ls=1;
		while(x!=y)
		{
			if(x>y)
			{
				int t=(x-1)/y;
				as=((as+ls*(1-q_mi(q,t))+mod)%mod);
				ls=(ls*q_mi(q,t)%mod+mod)%mod;
				x-=t*y;
			}
			else
			{
				int t=(y-1)/x;
				ls=(ls%mod*q_mi(p,t)%mod+mod)%mod;
				y-=t*x;
			}
		}
		as=(as+ls*p%mod+mod)%mod;
		cout<<as<<endl;
	}
 	return 0;
}