#include<bits/stdc++.h>
#define ll long long
using namespace std;
ll hc,hm,k,w,a,d,h,dc,dm,t;
bool flag;
void rec(){
    
}
int main(){
    cin>>t;
    while(t--){
        flag=0;
        scanf("%lld %lld",&hc,&dc);
        scanf("%lld %lld",&hm,&dm);
        scanf("%lld %lld %lld",&k,&w,&a);
        if(dc==hm){
            flag=1;
        }
        else {
            for(ll i=0;i<=k;i++){
                h=hc+i*a;
                d=dc+(k-i)*w;
                if((h-1) / dm >= (hm-1) / d){
                    flag=1;
                    break;
                }
            }
        }    
        if(flag){
            printf("YES\n");
        }
        else printf("NO\n");
    }
    return 0;
}