Ivan is painting 3 walls in his living room. Each wall measures 9 3/4 feet tall by 14 1/4 feet wide. Ivan needs to estimate the total area he will paint in order to determine the amount of paint to purchase. Which expression best represents the estimated area in square feet that Ivan will paint?​ A. 3(10) + 3(14) B. 3(10) × 3(14) C. 3 + (10 × 14) D. 3(10× 14)