#include<bits/stdc++.h>
#define rep(i,a,b) for(int i=a;i<=b;i++)
#define dwn(i,a,b) for(int i=a;i>=b;i--)
#define lowbit(x) (x&(-x))
#define MAXN 152501
#define int long long
#define mp(x,y) make_pair(x,y)
using namespace std;
typedef long long ll;
inline int read(){
	int x=0,f=1;
	char ch=getchar();
	while(ch>'9' || ch<'0'){if(ch=='-') f=-1; ch=getchar();}
	while('0'<=ch && ch<='9') x=(x<<1)+(x<<3)+ch-'0',ch=getchar();
	return x*f;
}
const int mod = 998244353;
int p0,p1;
int ksm(int x,int y){
	int res = 1;
	while(y){
		if(y&1) res = res * x % mod;
		x = x * x % mod;
		y >>= 1;
	}
	return res;
}
ll wk(int x,int y){
	if(x == y) return p0;
	if(x < y){
		return p0 * wk(x,y-x) % mod;
	}
	else{
		return (p0 + p1 * wk(x-y,y)) % mod;
	}
}
int x,y,a0,a1,b0;
signed main(){
	int T = read();
	while(T--){
		x = read(); y = read();
		a0 = read(); a1 = read(); b0 = read();
		b0 = (a0 + a1) % mod;
		p0 = a0 * ksm(b0,mod-2) % mod;
		p1 = a1 * ksm(b0,mod-2) % mod;
		printf("%lld\n",wk(x,y));
	}
	return 0;
}