pagesLeft.py

#!/usr/bin/env python3
#pagesLeft.py

#c = total pages of book.

a = input('How many pages have you read?\n')
b = input('How many days do you have left?\n')
a1 = int(a)
b1 = int(b)
c = 1019
d = str((c - a1) / b1)

if d.endswith('.0'):
    e = int((c - a1) / b1)
else:
    e = int((c - a1) / b1 + 1)

print('''\nYou have %s days left to read %s pages:
That is %s pages per day to finish your book.''' % (b, a, e))

#####

# Just some notes on float values I had to fix for my purposes.
#245 / 18 == 43
#245 / 18 =/= 43.0

#800 / 18 =/= 12
#800 / 18 =/= 12.166666666666666
#800 / 18 == 13