In math, multiplication is when you add a number to itself a certain number of times. The multiplication of 3 times 2 gives you an answer of 6. if you put two bunnies in a cage and end up with six, that's a different type of multiplication.
Multiplication falls under the mathematical category of arithmetic, and it's usually taught after addition and subtraction. When you memorize your times tables in school, you're learning multiplication. In science, the word multiplication is sometimes used to talk about the increase of an organism through generations of reproducing, like the multiplication of a farmer's sheep flock as more lambs are born. The Latin root word is multiplicare, "to increase."