Multiplying Monomials

$$What\ is\ the\ result\ of\ 4u⁹\times(-2u^3)?$$

$$What\ is\ the\ result\ of\ 3xy^2z^3\ \cdot\ 2z^2\ ?$$

$$What\ is\ the\ result\ of\ (-9a^6)\times(-5a^2b^4)?$$

$$What\ is\ the\ result\ of\ 2xy^2\cdot\ x^2y^3?$$

$$What\ is\ the\ result\ of\ 4s^5t^2\times4st^3?$$

$$What\ is\ the\ result\ of\ 2xy^2z\times4z^2?$$

What is the result of $$4𝑝𝑞^3\times(−2𝑝^4𝑞)=$$

What is the result of 12p³ × (-3p¹)?

What is the result of $$(−8a^4)\times-(12a^6b)?$$

What is the result of 4u³ × (-2u)?