Examples - I (pp. 1, 2). (1) 4 feet 6 inches =54 inches; .'. number is 54. (2) 15 feet 2 inches = 182 inches; .*. number is 182 / 7 or, 26. (3) Unit of square measurement is (192 / 12) square inches,... This description may be from another edition of this product.