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 divice (a , b):
	print "DIVIDING %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 = divice (100, 2)

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

print "Here is a puzzle."

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

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