18 ∙ 3^−3 + 2^3 ∙ 16^−1 = 18 * 1/27 + 8 * 1/16 = 18/27 + 8/16 = 18/27 + 1/2 = 36/54 + 27/54 = 63/54 = 1 9/54 = 1 1/6
3^−3 = 1/27
2^3 = 8
16^−1 = 1/16
