0 If a horse gallops, it runs very fast. -- (馬が)全速力で走る
1 the fastest speed a horse can run -- ギャロップ, 襲歩(しゅうほ:馬の最速の走り方)
We can complete it step by step however long the road is and it can't be completed however short the road is if you don't even mark your footprint.
道路がどれだけ長くても、一歩一歩完了することができますし、足跡をマークしなければ、道路がどんなに短くても完了することはできません。