#!/usr/bin/env python
# -*- coding: utf-8 -*-
# @File  : ex4.py
# @Author: Superhan
# @Date  : 2017/12/20
# @Desc  : created by Superhan
# @license : Copyright(C), Superhan 
# @Contact : chenchaohan@live.com 
# @Software : via PyCharm

cars =100
space_in_a_car =4.0
drivers=30
passengers=90
cars_not_driven=cars-drivers
cars_driven=drivers
carpool_capacity=cars_driven*space_in_a_car
average_passengers_per_car=passengers/cars_driven

print "There are ", cars,"cars available."
print "There are only", drivers,"drivers available."
print "There will be ",cars_not_driven,"empty cars today."
print "We can transport ",carpool_capacity," people today."
print "We have", passengers," to carpool today."
print "We need to put about ", average_passengers_per_car, "in each car ."