No problem, we've got 8100 and 9646 to multiply
8100 × 9646 = 9646 × (8100)
+ 9646 × 0 which equals 0
+ 9646 × 00 which equals 0
+ 9646 × 100 producing 964600
+ 9646 × 8000 producing 77168000

= 78132600
