Create a set of functions to perform basic calculator operations: addition, subtraction, multiplication, and division. These functions will take two numbers as input and return the result of the specified operation.

Parameters for functions: add, subtract, multiply, divide

add$(5,3)$

subtract$(10,4)$

multiply$(7,2)$

divide$(12,4)$

divide$(8,0)$

Output:

$8$

$6$

$14$

$3\mathrm{.}0$

Cannot divide by zero.