$\"\"$

\

The expression is $\"\"$ .

\

Quotient formula of complex numbers:

\

The complex numbers $\"\"$ and $\"\"$ ,

\

$\"\"$ . $\"\"$

\

$\"\"$ .

\

$\"\"$ .

\

$\"\"$

\

Convert the polar form to rectangular form.

\

$\"\"$ .

\

$\"\"$

\

$\"\"$ .

\

$\"\"$

\

The polar form of the product is $\"\"$ .

\

The rectangular form of the product is $\"\"$ .