sink one's teeth into

“There are plenty of data to sink one’s teeth into, not only in historical research but also in just the last few years, when there has been a huge volume across disciplines.”

His movie had attracted strong supporters who marveled at the sense of style and rigor but also some laments that it was hard to sink one's teeth into.

Putting two and two together only yields four, no matter how often it's done, but two to the eighth power gives a nice, round two hundred fifty-six, which is something one can sink one's teeth into.