#print (type (2*4))
#print (type (2-4))
#print (type (2/4))
#print (type (2+4))
#print (type (19.43958234))
#print (type (0))
# print (type (20 + 1.1))
# print (type (9.9 + 1.1))
# print (2 ** 2)
# print (2 ** 3)
# print (2 // 4)
# print (type (5 // 4))
# print (5 % 4)
# print (type (2.5 ** 3))
# print (type (6 % 4))
#mathfunctions
print(round (3.1))
print (round (3.9))
print (abs (-20))