Is It Possible To Stick A Knife In The Belly Button Is It Possible To Deal With Multiple Attackers Effectively Even If They Have Knives Or Sticks?

Is it possible to deal with multiple attackers effectively even if they have knives or sticks? - is it possible to stick a knife in the belly button

I mean, suppose the attacker has never studied a martial art. But they are struggling enough experience in the real road.