7 2/13 2 = (713 + 2) 2 = (91 + 2) 2 = 93 * 2 = 1865 7/16 8 = (516 + 7) 8 = (80 + 7) 8 = 87 * 8 = 6968 3/28 5 = (828 + 3) 5 = (224 + 3) 5 = 227 * 5 = 1135

Таким образом:

7 2/13 * 2 = 1865 7/16 * 8 = 6968 3/28 * 5 = 1135.