my $t = 0;
my $c = 0;
my $w = 0;
my $k = 0;
 
 
sub main(){
 
        if ($ARGV[0] > 100)     { die; }
        else { $t = shift @ARGV; }
 
        for (my $i = 0; $i < $t; $i++) {
        if ($ARGV[0] < 0)  { die; }
        else { $c = shift @ARGV; }
 
        $k = shift @ARGV;
 
        if ($ARGV[0] > 100)     { die; }
        else { $w = shift @ARGV; }
 
        if ( $c * $w <= $k  ) { print "yes\n"; }
        else { print "no\n";}
        }
}
main();

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Mwo1IDE1IDMKMSA1IDQKMTMgMjUgMg==

3
5 15 3
1 5 4
13 25 2