For an employee training, the employee to instructor ratio is 18 to 2. If there are 36 instructors for the training, how many employees participated in the training?
The ratio of employees to instructors is 18 to 2, which can be simplified to 9 to 1.
If there are 36 instructors for the training, the number of employees participating is 9 times the number of instructors, which is 9 * 36 = <<9*36=324>>324 employees. Answer: \boxed{324}.