print(3.14)
print(12 + 2)
print(type(8.0))
print(2.5 + 3.4)
print(0.1 + 0.2 - 0.3)
print('exp', 2**3.0)
print('exp', 2**3)
print('mod', 15%8)
print('div', 16/8)
print(type(16/9))
print('div', 15/8.0)
print('div', 15//8)
print('div', 5 / 2)
print('mod', 20.5 % 8)
# print(15623/1000)
# divide
print(15623/1000.0)
'''
zhu shi
'''