For a beginner, a math tutor suggests that you can find the multiples of a number by skip-counting to the next number. For Instance, if you want to find the multiples of 405, you could start at 405, and keep adding 405 over and over: 405, 810, 1215, 1620, and so on. Each of these numbers is a multiple of 405. Typically, this works best only for smaller numbers, as adding larger numbers together over and over can be difficult.
Another way to do this is to use multiplication. To find the first few multiples of 405, you could just multiply 405 by each number in sequence, first multiplying by 1, then 2, then 3, and so on, which we will outline below.
