#!/usr/bin/env python

def add(a, b):
    print("ADDING %d + %d" %(a, b))
    return a + b

def subtract(a, b):
    print("SUBTRACTING %d - %d" %(a, b))
    return a - b

def multiply(a, b):
    print("MULTIPLYING %d * %d" %(a, b))
    return a * b

def devide(a, b):
    print("DEVIDING %d / %d" %(a, b))
    return a / b

print("Let's do some math with just functions!")

age = add(30, 5)
height = subtract(78, 4)
weight = multiply(90, 2)
iq = devide(100, 2)

print("Age: %d, Height: %d, Weight: %d, IQ: %d" %(age, height, weight, iq))

# A puzzle for the extra credit, type it in anyway
print("Here is a puzzle.")

what = add(age, subtract(height, multiply(weight, devide(iq, 2))))

print("That becomes:", what, "Can you do it by hand?")
