how to drain the world's economy in less than one year

pizza_shop.py

# inspired by https://www.theverge.com/2020/5/18/21262316/doordash-pizza-profits-venture-capital-the-margins-ranjan-roy
import math

starting_cash = 16
cost_to_order = 16
doordash_pays = 24
cost_of_pizza = 4

cash = starting_cash

iteration = 1
total_pizzas = 0
while True:
    # how many pizzas can we afford to order?
    no_pizzas = int(math.floor(cash / cost_to_order))

    # outflow, order & make the pizza
    cash -= (cost_to_order + cost_of_pizza) * no_pizzas

    # inflow, doordash sends us $24 !
    cash += doordash_pays * no_pizzas

    total_pizzas += no_pizzas
    print('at iteration', iteration, 'you will have ordered',
          total_pizzas, 'pizzas, with', cash, 'cash on hand')
    iteration += 1
    if cash > 86_000_000_000_000:
        print("You have drained the world's economy")
        break