#n = int(raw_input("Type number: "))
#def countup(n):
#	if n > 10:
#		print "Ye."
#	else:
#		print n
#		countup(n + 1)
#countup(n)

#def countup(start, stop):
#	if start > stop:
#		print "Ye.\n"
#	else:
#		print start
#		countup(start + 1, stop)
#countup(4, 10)

#def countdown(start, stop):
#	if start < stop:
#		print "Ye."
#	else:
#		print start
#		countdown(start - 1, stop)
#countdown(10, 4)

#def adder(total, s): 
#	s = raw_input("Next number: ")
#	if s == '':
#		print "Running total: " + str(total) + "."
#	else:
#		total = total + float(s)
#		print "Running total: " + str(total) + "."
#		return adder(total, s)
#adder(0, "s")

#def biggest(number):
#	term = raw_input("Next: ")
#	if term == '':
#		print str(number)
#	else:
#		if number > float(term):
#			biggest(number)
#		else:
#			biggest(float(term))
#biggest(-float("inf"))

#def smallest(number):
#	term = raw_input("Next: ")
#	if term == '':
#		print str(number)
#	else:
#		if number < float(term):
#			smallest(number)
#		else:
#			smallest(float(term))
#smallest(float("inf"))

def pow(x, y):
	x = raw_input("Next number: ")
	if x == '':
		print str("No.")
	else:
		return float(x) * 
pow(2, 4)




























#n = int(raw_input("Type number: "))
#def countup(n):
#	if n > 10:
#		print "Ye."
#	else:
#		print n
#		countup(n + 1)
#countup(n)

#def countup(start, stop):
#	if start > stop:
#		print "Ye.\n"
#	else:
#		print start
#		countup(start + 1, stop)
#countup(4, 10)

#def countdown(start, stop):
#	if start < stop:
#		print "Ye."
#	else:
#		print start
#		countdown(start - 1, stop)
#countdown(10, 4)

#def adder(total, s): 
#	s = raw_input("Next number: ")
#	if s == '':
#		print "Running total: " + str(total) + "."
#	else:
#		total = total + float(s)
#		print "Running total: " + str(total) + "."
#		return adder(total, s)
#adder(0, "s")

#def biggest(number):
#	term = raw_input("Next: ")
#	if term == '':
#		print str(number)
#	else:
#		if number > float(term):
#			biggest(number)
#		else:
#			biggest(float(term))
#biggest(-float("inf"))

#def smallest(number):
#	term = raw_input("Next: ")
#	if term == '':
#		print str(number)
#	else:
#		if number < float(term):
#			smallest(number)
#		else:
#			smallest(float(term))
#smallest(float("inf"))

def pow(x, y):
	x = raw_input("Next number: ")
	if x == '':
		print str("No.")
	else:
		return float(x) * 
pow(2, 4)




























#n = int(raw_input("Type number: ")) #def countup(n): #	if n > 10: #		print "Ye." #	else: #		print n #		countup(n + 1) #countup(n) #def countup(start, stop): #	if start > stop: #		print "Ye.\n" #	else: #		print start #		countup(start + 1, stop) #countup(4, 10) #def countdown(start, stop): #	if start < stop: #		print "Ye." #	else: #		print start #		countdown(start - 1, stop) #countdown(10, 4) #def adder(total, s): #	s = raw_input("Next number: ") #	if s == '': #		print "Running total: " + str(total) + "." #	else: #		total = total + float(s) #		print "Running total: " + str(total) + "." #		return adder(total, s) #adder(0, "s") #def biggest(number): #	term = raw_input("Next: ") #	if term == '': #		print str(number) #	else: #		if number > float(term): #			biggest(number) #		else: #			biggest(float(term)) #biggest(-float("inf")) #def smallest(number): #	term = raw_input("Next: ") #	if term == '': #		print str(number) #	else: #		if number < float(term): #			smallest(number) #		else: #			smallest(float(term)) #smallest(float("inf"))