Ответ:

with open('INPUT.TXT') as f:

   data = [int(x) for x in f.read().strip().split()]

profit = 0

prices = data[0:3]

banks = data[3:6]

for i in range(3):

   max_price = max(prices)

   max_bank = max(banks)

   banks.remove(max_bank)

   prices.remove(max_price)

   profit += max_price * max_bank

with open('OUTPUT.TXT', 'w') as f:

   f.write(str(profit))

Объяснение: