Inactive Tutor answered 02/20/18
Tutor
New to Wyzant
He would be making it for 12/4=3 so 3 times the people, 3 times the amounts in the recipe. However, since you didn't mention how much celery was in the original recipe, all I can do is tell you to multiply it by 3 and you'll get the answer.
You can do it!