When a user types into Google, they are not doing math homework. They are looking for a cracked, pre-packaged version of the game that includes all $10,000+ worth of DLC for free.
A full legit install of Train Simulator Classic with all DLC consumes roughly of hard drive space. A repack might download as a 50GB zip file, but upon installation, it will still explode into 300GB.
The total cost to purchase all downloadable content (DLC) for Train Simulator Classic