User blog comment:Roranoa Drake II/Episode 725 Review: Road to Gear Fourth/@comment-24850639-20160111190801/@comment-142.51.31.17-20160112155745

Just like 1080 is an amped up version of 108, this is a new version of 1000 worlds (the technique he used in his first meeting with Mihawk).

He's using Buddhist math to say that this technique is equal to that technique cubed (to the power of three).