Oscar_ceremoni

rent = float(input())

price_statuets = rent - (rent * 0.30)
price_catering = price_statuets - (price_statuets * 0.15)
price_music = price_catering * 0.5

total_price = rent + price_statuets + price_catering + price_music
print(f'{total_price:.2f}')