Write the missing statements in the following program so that it prompts the
user to input two numbers. If one of the numbers is \(0,\) the program should
output a message indicating that both numbers must be nonzero. If the first
number is greater than the second number, it outputs the first number divided
by the second number; if the first number is less than the second number, it
outputs the second number divided by the first number; otherwise, it outputs
the product of the numbers.
