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  1. or download this
    $Hash{44.52}{param1}{key1} = [101.01,'val1'];
    $Hash{95.01}{param2}{key2} = [101.02,'val2'];
    
  2. or download this
    my $neededVal = 80.0;
    if (defined $Hash{$neededVal}{param1}{key1}) {
    ...
    print "$_\n"; #this prints 80.0 as a KEY (among the others)!!! How?..
    }
    }