How do you simplify `4(a-3)`?

Related questions

• What is Multiplication of Monomials by Polynomials?
• How do you multiply monomials by polynomials?
• How do you multiply monomials by monomials?
• How do you multiply `(3xy^5)(-6x^4y^2)`?
• How do you multiply and simplify `6ab(-10a^2 b^3+c^5)`?
• How do you simplify `-3a^2b(9a^2-4b^2)`?
• How do you multiply `y(xy^4)`?
• How do you multiply `(2x-1)(x^3-2x^2+3x-4)`?
• How do you multiply `(5n^2)(2n^5 - 2n^3 3n^7)`?
• How do you simplify `2t^2+(3+5)(4t)`?