Fold a 26 cm wide 18 cm rectangular paper into four corners, cut out a rectangle with a side length of 4 cm, and then make a rectangular paper box without cover. What is the volume of this paper box?

Fold a 26 cm wide 18 cm rectangular paper into four corners, cut out a rectangle with a side length of 4 cm, and then make a rectangular paper box without cover. What is the volume of this paper box?

(26-8) (18-8) 4 = 720 (cm3)