Let’s look the product of two monomials [[$ 3a^2 $]]​ and [[$ 5a^4 $]]​ Both terms are formed from a coefficient and a product of a variable. As a result, the product calculation [[$ 3a^2 \cdot 5a^4 $]] can be simplified as follows:

If monomials have the same letters as variables, the rules for calculating powers are applied to their multiplication. If the variables have different letters, they remain in multiplication form and cannot be combined into powers.