"""Exercise 7.2.3 — Doubling a recipe

Chapter 7: Operators — Everyday Programming

A recipe needs 2 cups of flour, and this program should double it for a
bigger batch, printing 4.

This program contains exactly one bug. Solution: sol_7_2_3.py
"""

cups_flour = 2
cups_flour *= 2
print(Cups_flour)   # expected: 4