Division or multiplication and explain it.

Multiplication is a mathematical operation that represents repeated addition. It combines two numbers (factors) to get a product.

Example:

$$3 \times 4 = 3 + 3 + 3 + 3 = 12$$

Here, 3 is added 4 times, resulting in a product of $\boxed{12}$.

Division is a mathematical operation that represents the splitting of a number (dividend) into equal parts, determined by another number (divisor), to find how many times the divisor is contained in the dividend (quotient).

Example:

$$\frac{12}{4} = 3$$

Here, 12 is divided into 4 equal parts, with each part being $\boxed{3}$.