Multiples of 18 are the results of multiplying 18 by whole numbers. For example, the first few multiples of 18 are 18 (1 x 18), 36 (2 x 18), 54 (3 x 18), and 72 (4 x 18). These numbers are evenly divisible by 18 without any remainder. To find more multiples of 18, you can continue multiplying by whole numbers. The pattern continues indefinitely, producing numbers like 90 (5 x 18), 108 (6 x 18), and so on. Multiples of 18 are useful in various mathematical applications, including fractions, division, and problem-solving.