In mathematics, a multiple of a number is the result of multiplying that number by an integer. For example, the multiples of 3 include 3, 6, 9, 12, and so on. This means that if you take 3 and multiply it by 1, 2, 3, etc., you get these results. Multiples are useful in various areas, such as arithmetic and algebra. They help in solving problems related to factors, divisibility, and patterns in numbers. Understanding multiples can also aid in real-life situations, like determining time intervals or grouping items.