Have Object display integer (amount needed until destroy)

Hello, I have a gate that needs to be shot a certain amount of times before It will open. I have an integer set up in a door’s blueprint for “HITS NEEDED” and casting to the projectile to lower the number until reaching 0.
I would like the actual door to have the number displayed to the player and for it to go down as the integer goes down.
Any Ideas?

Also, I think I would like the door to explode when reaching 0. BONUS POINTS if you can give me a brief workflow on where to begin with that.