The method of multiplying rational expressions is same as the method of multiplying fractions. That is, just multiply the numerators to get the numerator of the product and multiply the denominators to get the denominator of the product.
For all rational expressions and with b ≠ 0 and d ≠ 0, .
Multiply and then simplify.
Multiply the numerators and multiply the denominators. Arrange the expression so like variables are together.
Divide out the common factors.
Note: You can speed up the process by reducing first, before multiplying.