He's only about 4-5 times stronger than an average man. That's around Strongman levels of strength, just compressed into a 6 feet frame with agility. And really strong bite and claws. Dangerous, yes. But he can't just tear off limbs like chicken wings.
But, they at least 2 men of more can each grab hold of a limb and restrain it.
Damage wise, we attack it's spine near its butt with kicks and jumps from those 300 lb+ guys.
Also we strike it's head as much as possible. The gorilla will eventually get knocked out or slow down so much we can hold it down. The gorilla can not take repeated haymakers to the dome from Mark Henry and Brian shaw level men