The mishna at the beginning of Peah states that the study of Torah outweighs them all (i.e., all of the other mitzvos).  The Vilna Gaon, in Shenos Eliyahu, explains why this is so:

It is because every word of Torah study is a fulfillment of a mitzvah on its own, and that mitzvah is equivalent to all the other mitzvos combined! 

Thus, a single page of Gemara contains the opportunity to fulfill hundreds of mitzvos, each of which is equivalent to all the other mitzvos!

~ R’ Chaim Kanievsky zt”l