
quite; very
10^48; quindecillion
ごく普通の生活を送っています。
I am living a very ordinary life.
極という数は、10を48回掛け合わせた非常に大きな数を表す言葉だ。
The number called "goku" represents an extremely large number obtained by multiplying 10 by itself 48 times.
ごく少数の人しか知りません。
Only very few people know.