"""
优先级:
**
* / // %
+ -
"""
a, b = 9, 5

print(a * b)  # 乘法
print(a / b)  # 浮点除法
print(a // b)  # 整除[向下取整]
print(a % b)  # 取膜
print(a ** b)  # 幂

print('-' * 10, 'ceil和floor', '-' * 10, sep='')
import math

# 向上取整 - ceil
print(math.ceil(a / b))
# 向下取整 - floor
print(math.floor(a / b))