it's not a great idea cbetting with 3 opponents.

your betting on the flop depends more on your opponents cards than yours. if the flop comes Q52r and there's 3 players in the hand who all limped and you have position then you can take a stab at the pot if it's checked to you. it doesn't really matter what cards you have.

i think cbetting between 1/3 to 3/4 pot is the best plan most of the time. with 4 players in the hand you have to be careful and betting 3/4 pot could be expensive. half/third pot bets are better. narrows down opponents in hand and you can maybe take the pot on the turn if players are still in the hand.

if the board is AsKsQs you need to be really careful when you cbet