1206/7 : 3 = (120 * 7 + 6) / 7 : 3 = (840 + 6) / 7 : 3 = 846 / 7 : 3 = 846 / 7 * 1/3 = 846 / (7 * 3) = 846 / 21 = 282 / 7 = 40 2/7
Ответ: 40 2/7