3. Find the total area of the floor not covered by the carpet

A floor is 13\( m\) long and 9 \(m\) wide. A carpet is laid on the floor of size 6\(m\) long and 6\(m\) wides, then find the area of the floor that is not covered by the carpet.

 

The total area of the floor not covered by the carpet is  $m^2$.