Calculating how many cases you can open with your budget :P

casecalc.py

GREEN = "\033[38;5;150m"
RESET = "\033[0m"

budget = float(input(f"{RESET}╭{GREEN} Budget: {RESET}"))
key = float(input(f"{RESET}├{GREEN} Key price: {RESET}"))
case = float(input(f"{RESET}╰{GREEN} Case price: {RESET}"))

combocost = case + key
openamount = budget // combocost

openamount_message = f" {RESET}Amount of cases you can open: {GREEN}{int(openamount)}{RESET} "
leftover = budget - (combocost * openamount)
leftover = round(leftover, 2)
leftover_message = f" {RESET}Money left: {GREEN}{leftover}{RESET} "

max_length = max(len(openamount_message), len(leftover_message))

top_line = f"╭─ {GREEN}Result{RESET} " + "─" * ((max_length - 9) - 19) + "╮"
bottom_line = "╰" + "─" * (max_length - 19) + "╯"

print(top_line)
print(f"│{openamount_message}{' ' * (max_length - len(openamount_message))}│")
print(f"│{leftover_message}{' ' * (max_length - len(leftover_message))}│")
print(bottom_line)