Odpowiedź:
1 i 2/3 * 1 i 4/5 = 5/3 * 9/5 = 45/15 = 3
2 i 1/4 * 1 i 3/5 = 9/4 * 8/5 = 72/20 = 3 i 12/30 = 3 i 4/10 = 3 i 2/5
