change bureau

bitcoin_count = int(input())
chinese_yuan_count = float(input())
commission = float(input())
euro = 1.95
dollar = 1.76
bitcoin_price = 1168
chinese_yuan_price = 0.15 * dollar

total = (bitcoin_price * bitcoin_count + chinese_yuan_price * chinese_yuan_count) / euro

after_commission = total - (commission/100 * total)
print(f'{after_commission:.2f}')