How is briyani prepared?

For Example:
Chicken 7 lbs
Gharam masala 50 ge or 1.75 oze
Onions 2
Edible oil = 300ml
Utensil 10 inches / 7 inches
Water-3 / 500 ml Initial
Salt
Rice-2 / in 500 ml measure
8-10 servings
multiply by number of people.
What materials are required to prepare for 100 people?

How many should you prepare every 24 hours?

How big should the utensils be?

Do I need prefabricated kitchen utensils?