def calculate_total_balance(current_balance: float, fee_rate: float, bank_count: int):
	total_balance = 0
	for i in range(bank_count):
		total_balance += current_balance
		current_balance = (1.0 - fee_rate) * current_balance
	return total_balance


def main():
	bank_count = int(input())
	fee_rate = float(input())
	print(calculate_total_balance(100, fee_rate, bank_count))

if __name__ == "__main__":
	main()