#ifndef INCLUDED_MAIN
#define INCLUDED_MAIN

#include __FILE__

struct stat{
    ll h,a,s;
};

using namespace nskr;
using mint = modint<0>;
int main(void){
    int t; cin >> t;
    int i;
    for(;t--;){
        stat g,c;
        cin >> c.h >> c.a >> c.s >> g.h >> g.a >> g.s;
        bool s = false;
        if(c.s < g.s){
            s = true;
            swap(g,c);
        }
        if(c.s == g.s){
            int l = min((c.h-1) / g.a, (g.h-1) / c.a);
            c.h -= l*g.a;
            g.h -= l*c.a;
            if(c.h > g.a){
                int u = (c.h-1) / g.a;
                mint p = 0, q = 1; q/=10;
                // rep(i,u){
                //     p += q*9;
                //     q/=10;
                // }
                p = mint(1) - (mint(1)/10).pow(u);
                p += (mint(1)-p)/2;
                cout << p.val() << "\n";
            }else{
                int u = (g.h-1) / c.a;
                mint p = 0, q=1; q/=10;
                // rep(i,u){
                //     p+=q*9;
                //     q/=10;
                // }
                p = mint(1) - (mint(1)/10).pow(u);

                p = (mint(1)-p)/2;
                cout << p.val() << "\n";
            }
        }else{
            int l = min((c.h-1) / g.a, (g.h-1) / c.a);
            c.h -= l*g.a;
            g.h -= l*c.a;

            if(c.h > g.a){
                int u =( c.h-1) / g.a;
                mint p = 0, q = 1; q/=10;
                // rep(i,u){
                //     p += q*9;
                //     q/=10;
                // }
                p = mint(1) - (mint(1)/10).pow(u);

                mint r = mint(1)-p;
                p += r *10 /11;
                if(s){
                    cout << (mint(1)-p).val() << "\n";
                }else{
                    cout << p.val() << "\n";
                }
            }else{
                
                int u = (g.h-1) / c.a;
                mint p = 0, q = 1; q/=10;
                // rep(i,u){
                //     p += q*9;
                //     q/=10;
                // }
                p = mint(1) - (mint(1)/10).pow(u);

                mint r = mint(1)-p;
                p = r *10 /11;
                if(s){
                    cout << (mint(1)-p).val() << "\n";
                }else{
                    cout << p.val() << "\n";
                }
            }

        }
    }
}

#else
#include <bits/stdc++.h>
using namespace std;

using ll = long long;
using ld=  long double;
#define rep(i,n) for(i=0;i<(n);i++)
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()

namespace nskr{
    template <int id = 0>
    struct modint{
        int v;

        static int& MOD(){
            static int mod = 998244353;
            return mod;
        }

        static int get_mod() { return MOD(); }
        static void set_mod(int m) { MOD() = m; }

        modint() :v(0){}
        modint(long long x) : v( (x>=0 ? x%MOD() : (x%MOD() + MOD()))){}

        long long val() const {return v;}

        modint& operator+=(const modint& x){if((v+=x.v) >= MOD()) v-=MOD(); return *this; }
        modint& operator-=(const modint& x){if((v-=x.v) <  0  ) v+=MOD(); return *this; }
        modint& operator*=(const modint& x){v = (int)(1ll * v * x.v % MOD()); return *this;}
        modint& operator/=(const modint& x){v = (int)(1ll * v * x.inv().val() % MOD()); return *this;}

        modint operator-() const {return modint(-v);}
        modint operator+() const {return *this;}

        modint operator+(const modint& x) const {return modint(*this)+=x;}
        modint operator-(const modint& x) const {return modint(*this)-=x;}
        modint operator*(const modint& x) const {return modint(*this)*=x;}
        modint operator/(const modint& x) const {return modint(*this)/=x;}

        bool operator== (const modint& x) const {return v==x.v;}
        bool operator!= (const modint& x) const {return v!=x.v;}

        friend ostream &operator<<(ostream &os, const modint &p) { return os << p.v; }

        friend istream &operator>>(istream &is, modint &a) {
            int t;
            is >> t;
            a = modint<id>(t);
            return (is);
        }


        modint pow(unsigned long long n) const { 
            modint ret(1), mul(v);
            while(n){
                if(n&1) ret *= mul;
                mul *= mul;
                n >>=1;
            }
            return ret;
        }

        modint inv() const{ //参考：　https://qiita.com/sesame0224/items/f2ac77c367f588c0d29d
            int a = v, b = MOD(), u = 1, w = 0;
            while(b){
                int t = a/b;                 
                swap(a -= t*b, b);
                swap(u -= t*w, w);
            }
            u%=MOD();
            return(u<0?u+MOD():u);
        }


    };

}



#endif