import arithmetic

while True:

query = raw_input()

token_list = query.split(" ")

number_one=int(token_list[1])

number_two=int(token_list[2])

if token_list[0] == '+':

print arithmetic.add (number_one, number_two)

elif token_list[0] == '-':

print arithmetic.subtract (number_one, number_two)

elif token_list[0] == '*':

print arithmetic.multiply (number_one, number_two)

elif token_list[0] == '/':

print arithmetic.divide (number_one, number_two)

elif token_list[0] == 'square':

print arithmetic.square (number_one)

elif token_list[0] == 'cube':

print arithmetic.cube (number_one)

elif token_list[0] == 'pow':

print arithmetic.power (number_one, number_two)

elif token_list[0] == 'mod':

print arithmetic.mod (number_one, number_two)

else:

print "I don't understand."