# -*- coding: utf-8 -*-
"""
Created on Mon May 20 15:48:40 2019

@author: qinxd
"""
#常用的数学计算

#常用的数学计算
from math import exp,log,sqrt

print("Output #11  :{0:.4f}".format(exp(3))) 
print("Output #12  :{0:.2f}".format(log(4))) 
print("Output #13  :{0:.4f}".format(sqrt(81)))       