YOU SAID:

I own a massive number of both pens and pencils equally.

INTO JAPANESE

私はペンと鉛筆の両方を均等に所有しています。

BACK INTO ENGLISH

I equally own both pen and pencil.

INTO JAPANESE

私はペンと鉛筆の両方を等しく所有しています。

BACK INTO ENGLISH

I equally own both pen and pencil.