def area(width, height):
    result = width * height
    return result

result = area(5, 6)
print(result)

area(10, 16)
area(2, 4) 

def subtract(num1, num2):
    result = num1 - num2
    return result

result = subtract(9, 3)
print(result)
result = subtract (8, 5)
print(result)

def add(num1, num2): 
    result = num1 + num2
    return result

result = add(10, 4)
print(result)
result = add(6, 23)
print (result)