A cube has 6 equal square faces. Area of one face = 57 × 57 = 3249. Total surface area = 6 × 3249 = 19494 square cm. Total surface area means the combined area of all outside faces. A cube has 6 equal square faces, so after finding one face area, multiply by 6. The answer is in square units, so the correct choice is 19494 cm².