#include <bits/stdc++.h>
using namespace std;
#if __has_include("all.hpp")
#include "all.hpp"
#else
#include <atcoder/all>
#endif
using namespace atcoder;
using mint=modint998244353;
int main(void){
    int t;
    cin>>t;
    while(t--){
        long long hc,ac,sc,hg,ag,sg;
        cin>>hc>>ac>>sc>>hg>>ag>>sg;
        long long shc=(hc-1)/ag,shg=(hg-1)/ac;
        {
            long long tmp=min(shc,shg);
            shc-=tmp;
            shg-=tmp;
        }
        if(shg==0){
            mint tmp=1;
            tmp*=((mint)1/10).pow(shc);
            tmp/=11;
            if(sc>sg){
                
            }else if(sc<sg){
                tmp*=10;
            }else{
                tmp+=tmp*10;
                tmp/=2;
            }
            cout<<(1-tmp).val()<<endl;
        }else{
            mint tmp=1;
            tmp*=((mint)1/10).pow(shg);
            tmp/=11;
            if(sc<sg){
                
            }else if(sc>sg){
                tmp*=10;
            }else{
                tmp+=tmp*10;
                tmp/=2;
            }
            cout<<tmp.val()<<endl;
        }
    }
    return 0;
}