include<bits/stdc++.h>

define ll long long

using namespace std; ll s(int x1,int y1,int x2,int y2){

return (ll)(x2-x1)*(ll)(y2-y1);

}

int main(){

//freopen("paper.in","r",stdin);
//freopen("paper.out","w",stdout);
int t,width,height,xfold,cnt,x1,y1,x2,y2;
ll ans;
cin >> t;
while(t--){
	cin >> width >> height >> xfold >> cnt >> x1 >> y1 >> x2 >> y2;
	if(xfold << 1 == width) ans = s(x1,y1,x2,y2)*(ll)(cnt+1) << 1;
    else if(xfold < double(width)/2){
            if(x2 <= xfold) ans = s(x1,y1,x2,y2)*(ll)(cnt+1) << 1;
            else if(x1 <= xfold) ans = (s(x1,y1,xfold,y2)*(ll)(cnt+1) << 1) + (s(xfold,y1,x2,y2)*(ll)(cnt+1));
                 else ans = s(x1,y1,x2,y2)*(ll)(cnt+1);
    }else{
           if(x2 <= width-xfold) ans = s(x1,y1,x2,y2)*(ll)(cnt+1) << 1;
           else if(x1 <= width-xfold) ans = (s(x1,y1,width-xfold,y2)*(ll)(cnt+1) << 1) + (s(width-xfold,y1,x2,y2)*(ll)(cnt+1));
                else ans = s(x1,y1,x2,y2)*(ll)(cnt+1);
    }
    cout << (ll)(width)*(ll)(height)-ans << endl;
}
return 0;

}