Use disttributive probtery

In general, for any numbers $a$, $b$, and $c$:
$a(b + c) = ab + ac$
or
$a(b - c) = ab - ac$

Example:
$3(4 + 5) = 3 \times 4 + 3 \times 5$
$3(9) = 12 + 15$
$27 = 27$