Translation for '快刀斬亂麻'?

Just ask Alexander the Great... "cutting the Gordian knot."

following quoted from wikipedia:

The Gordian Knot is a legend of Phrygian Gordium associated with Alexander the Great. It is often used as a metaphor for an intractable problem (disentangling an "impossible" knot) solved easily by loophole or "thinking outside the box" ("cutting the Gordian knot"):

Turn him to any cause of policy,
The Gordian Knot of it he will unloose,
Familiar as his garter. 

— Shakespeare, Henry V, Act 1 Scene 1. 45–47