Trade

city = input()
sales = float(input())

if sales < 0 or city != 'London' or city != 'New York' or city != 'Sydney':
    print('error')
elif 0 <= sales < 500:
    if city == 'London':
        print(f'{sales * 0.05:.2f}')
    elif city == 'New York':
        print(f'{sales * 0.045:.2f}')
    elif city == 'Sydney':
        print(f'{sales * 0.055:.2f}')
    else:
        print('error')
elif 501 <= sales <= 1000:
    if city == 'London':
        print(f'{sales * 0.07:.2f}')
    elif city == 'New York':
        print(f'{sales * 0.075:.2f}')
    elif city == 'Sydney':
        print(f'{sales * 0.08:.2f}')
    else:
        print('error')
elif sales > 10000:
    if city == 'London':
        print(f'{sales * 0.12:.2f}')
    elif city == 'New York':
        print(f'{sales * 0.13:.2f}')
    elif city == 'Sydney':
        print(f'{sales * 0.145:.2f}')
    else:
        print('error')