Answer-If 49 × 45 = 45, 45 × 69 = 35 and 67 × 78 = 57, then 39 × 43 = ?

49 45 4 9 4 5 36 9 45 45 69 4 5 6 9 20 15 35 67 78 6 7 7 8 42 15 57 39 43 3 9 4 3 27 7 34