На логику 91*73=5 , 83*96=6 ,42*61= 1 , 31*82 = ? какой будет ответ ​

1) 91 * 73=5

(9-1)*(7-3) = 8*4 = 32

3 + 2 = 5

2) 83 * 96 = 6

(8-3)*(9-6) = 5 * 3 = 15

1 + 5 = 6

3) 42 * 61 = 1

(4-2)*(6-1) = 2 * 5 = 10

1 + 0 = 1

4) 31 * 82 = ?

(3-1)*(8-2) = 2 * 6 = 12

1 + 2 = 3

ответ: 31 * 82 = 3