a = int(input("Enter first: "))
b = int(input("Enter second: "))

a, b = b, a

print("a =", a)
print("b =", b)

Enter first:  23
Enter second:  12


a = 12
b = 23

num = int(input("Enter number: "))
print("Cube =", num ** 3)

Enter number:  5


Cube = 125

num = int(input("Enter number: "))
if num % 7 == 0:
    print("Divisible by 7")
else:
    print("Not divisible")

Enter number:  3


Not divisible