repainting

nylon = int(input())
paint = int(input())
thinner_lt = int(input())
hours_workers = int(input())

nylon_price = (nylon + 2) * 1.5
paint_price = (paint * 1.1) * 14.50
thinner_lt_price = thinner_lt * 5
total_sum = nylon_price + paint_price + thinner_lt_price + 0.4
workers_sum = (total_sum * 0.30) * hours_workers
total = total_sum + workers_sum
print(total)