Odpowiedź:
1 i 1/3 * 9/11 = 4/3 * 9/11 = 12
4 i 3/14 * 7 = 59/14 * 7 = 59/2 = 29 i 1/2
15 * 3 i 1/5 = 15 * 16/5 = 48
3 i 2/3 * 1 i 1/5 = 11/3 * 6/5 = 22/5 = 4 i 2/5
