No problem, we've got 8400 and 8144 to multiply
8400 × 8144 = 8144 × (8400)
+ 8144 × 0 giving us 0
+ 8144 × 00 which equals 0
+ 8144 × 400 producing 3257600
+ 8144 × 8000 which equals 65152000

= 68409600
