Can you replace question mark with the correct number in the below table sequence riddle?

Table Sequence Riddle

118119

The sequence is generated by the pattern below
1#2
3#4
1 * 4 + 2 = 6 , 2 * 3 + 1 = 7 => 67

3#4
5#6
3 x 6 + 4 = 22, 4 x 5 + 3 = 23 = 2223

5#6
7#8
5 x 8 + 6 = 46, 6 x 7 + 5 = 47 = 4647

7#8
9#10
7 * 10 + 8 , 8 * 9 +7 = 7879

Based on above pattern, desired number will be calculated as :
9#10
11#12
9 * 12 + 10 = 118, 10 * 11 + 9 = 119 = 118119

Discussion