To get started with multiples, the easiest way is just to add a number to itself over and over again. For instance, if you want to find the multiples of 341 using this method, you could start at 341, and keep adding 341 over and over: 341, 682, 1023, 1364, and so on. Each of these numbers is a multiple of 341. Usually, this method works with numbers that are easily added to itself. As you get into larger numbers, it can become difficult to continue adding.
Another way to do this, as discussed above, is to use choose any number and multiply it by 341. To find the first few multiples of 341, you could just multiply the 341 by 1, then 2, then 3, and so on, until you have as many multiples as you would like.
There are an endless number of multiples! You can keep using either of these methods to find as many multiples as you would like.