World’s Easiest DIY Electric Train

Couldn't you at least please use decent units instead of this weird incomprehensible imperial stuff?!? How the heck should I know what 90 feet, 8 gauge or 5/8" are in real life numbers?!?
Hello, here's a message to all Americans: The world doesn't end at the borders of the USA! And the rest of the world uses measurements with which one can actually easily calculate!