#include <bits/stdc++.h>
using namespace std;
using ll = long long;
ll mod = 998244353LL;
ll inv2 = 499122177LL;
ll inv10 = 299473306LL;
ll inv11 = 272248460LL;

ll func(ll n){
    ll ans = 1,rec = inv10;

    while(n){
        if(n&1) ans *= rec;
        ans %= mod;

        rec *= rec;
        rec %= mod;

        n >>= 1LL;
    }

    return ans;
}

int main() {
    int T;
    cin >> T;

    while(T){
        T--;

        ll hc,ac,sc,hg,ag,sg;
        cin >> hc >> ac >> sc >> hg >> ag >> sg;
    
        ll ans;
        if(sc == sg) ans = inv2;
        if(sc > sg) ans = (10LL * inv11)%mod;
        if(sc < sg) ans = inv11;

        ll turn_c = (hc - 1LL) / ag,turn_g = (hg - 1LL) / ac;

        if(turn_c == turn_g){
            cout << ans << endl;
            continue;
        }

        ll k = func(abs(turn_c - turn_g));
        ans *= k;
        ans %= mod;
    
        if(turn_c > turn_g){
            ans += mod+1LL - k;
            ans %= mod;
        }

        cout << ans << endl;

    }
    
}