Multiplying Fractions · Challenge problem

A photo that is $3\dfrac{1}{2}$ inches long and $2\dfrac{1}{2}$ inches wide is glued onto a card that is $4\dfrac{1}{2}$ inches long and $3\dfrac{1}{2}$ inches wide. What is the area of the part of the card that is not covered by the photo, in square inches?